diff --git a/boa_engine/src/builtins/array/mod.rs b/boa_engine/src/builtins/array/mod.rs
index 1f8aafb47c..bfea05fe98 100644
--- a/boa_engine/src/builtins/array/mod.rs
+++ b/boa_engine/src/builtins/array/mod.rs
@@ -66,12 +66,12 @@ impl IntrinsicObject for Array {
                 Attribute::CONFIGURABLE,
             )
             .property(
-                "length",
+                utf16!("length"),
                 0,
                 Attribute::WRITABLE | Attribute::NON_ENUMERABLE | Attribute::PERMANENT,
             )
             .property(
-                "values",
+                utf16!("values"),
                 values_function.clone(),
                 Attribute::WRITABLE | Attribute::NON_ENUMERABLE | Attribute::CONFIGURABLE,
             )
@@ -191,7 +191,7 @@ impl BuiltInConstructor for Array {
             };
             // e. Perform ! Set(array, "length", intLen, true).
             array
-                .set("length", int_len, true, context)
+                .set(utf16!("length"), int_len, true, context)
                 .expect("this Set call must not fail");
             // f. Return array.
             Ok(array.into())
@@ -250,7 +250,7 @@ impl Array {
         // 6. Perform ! OrdinaryDefineOwnProperty(A, "length", PropertyDescriptor { [[Value]]: 𝔽(length), [[Writable]]: true, [[Enumerable]]: false, [[Configurable]]: false }).
         crate::object::internal_methods::ordinary_define_own_property(
             &array,
-            "length".into(),
+            &utf16!("length").into(),
             PropertyDescriptor::builder()
                 .value(length)
                 .writable(true)
@@ -291,7 +291,7 @@ impl Array {
             .properties_mut()
             .override_indexed_properties(elements);
         array
-            .set("length", length, true, context)
+            .set(utf16!("length"), length, true, context)
             .expect("Should not fail");
 
         // 5. Return array.
@@ -475,7 +475,7 @@ impl Array {
             }
 
             // 13. Perform ? Set(A, "length", 𝔽(len), true).
-            a.set("length", len, true, context)?;
+            a.set(utf16!("length"), len, true, context)?;
 
             // 14. Return A.
             return Ok(a.into());
@@ -508,7 +508,7 @@ impl Array {
             // iv. If next is false, then
             let Some(next) = next else {
                     // 1. Perform ? Set(A, "length", 𝔽(k), true).
-                    a.set("length", k, true, context)?;
+                    a.set(utf16!("length"), k, true, context)?;
 
                     // 2. Return A.
                     return Ok(a.into());
@@ -609,7 +609,7 @@ impl Array {
         }
 
         // 8. Perform ? Set(A, "length", lenNumber, true).
-        a.set("length", len, true, context)?;
+        a.set(utf16!("length"), len, true, context)?;
 
         // 9. Return A.
         Ok(a.into())
@@ -733,7 +733,7 @@ impl Array {
             }
         }
         // 6. Perform ? Set(A, "length", 𝔽(n), true).
-        arr.set("length", n, true, context)?;
+        arr.set(utf16!("length"), n, true, context)?;
 
         // 7. Return A.
         Ok(JsValue::new(arr))
@@ -778,7 +778,7 @@ impl Array {
             len += 1;
         }
         // 6. Perform ? Set(O, "length", 𝔽(len), true).
-        o.set("length", len, true, context)?;
+        o.set(utf16!("length"), len, true, context)?;
         // 7. Return 𝔽(len).
         Ok(len.into())
     }
@@ -805,7 +805,7 @@ impl Array {
         // 3. If len = 0, then
         if len == 0 {
             // a. Perform ? Set(O, "length", +0𝔽, true).
-            o.set("length", 0, true, context)?;
+            o.set(utf16!("length"), 0, true, context)?;
             // b. Return undefined.
             Ok(JsValue::undefined())
         // 4. Else,
@@ -820,7 +820,7 @@ impl Array {
             // e. Perform ? DeletePropertyOrThrow(O, index).
             o.delete_property_or_throw(index, context)?;
             // f. Perform ? Set(O, "length", newLen, true).
-            o.set("length", new_len, true, context)?;
+            o.set(utf16!("length"), new_len, true, context)?;
             // g. Return element.
             Ok(element)
         }
@@ -946,7 +946,7 @@ impl Array {
         // 1. Let array be ? ToObject(this value).
         let array = this.to_object(context)?;
         // 2. Let func be ? Get(array, "join").
-        let func = array.get("join", context)?;
+        let func = array.get(utf16!("join"), context)?;
         // 3. If IsCallable(func) is false, set func to the intrinsic function %Object.prototype.toString%.
         // 4. Return ? Call(func, array).
         if let Some(func) = func.as_callable() {
@@ -1061,7 +1061,7 @@ impl Array {
         // 3. If len = 0, then
         if len == 0 {
             // a. Perform ? Set(O, "length", +0𝔽, true).
-            o.set("length", 0, true, context)?;
+            o.set(utf16!("length"), 0, true, context)?;
             // b. Return undefined.
             return Ok(JsValue::undefined());
         }
@@ -1093,7 +1093,7 @@ impl Array {
         // 7. Perform ? DeletePropertyOrThrow(O, ! ToString(𝔽(len - 1))).
         o.delete_property_or_throw(len - 1, context)?;
         // 8. Perform ? Set(O, "length", 𝔽(len - 1), true).
-        o.set("length", len - 1, true, context)?;
+        o.set(utf16!("length"), len - 1, true, context)?;
         // 9. Return first.
         Ok(first)
     }
@@ -1163,7 +1163,7 @@ impl Array {
             }
         }
         // 5. Perform ? Set(O, "length", 𝔽(len + argCount), true).
-        o.set("length", len + arg_count, true, context)?;
+        o.set(utf16!("length"), len + arg_count, true, context)?;
         // 6. Return 𝔽(len + argCount).
         Ok((len + arg_count).into())
     }
@@ -2042,7 +2042,7 @@ impl Array {
         }
 
         // 15. Perform ? Set(A, "length", 𝔽(n), true).
-        a.set("length", n, true, context)?;
+        a.set(utf16!("length"), n, true, context)?;
 
         // 16. Return A.
         Ok(a.into())
@@ -2102,7 +2102,7 @@ impl Array {
             if !next.is_null_or_undefined() {
                 // i. Let S be ? ToString(? Invoke(nextElement, "toLocaleString", « locales, options »)).
                 let s = next
-                    .invoke("toLocaleString", args, context)?
+                    .invoke(utf16!("toLocaleString"), args, context)?
                     .to_string(context)?;
 
                 // ii. Set R to the string-concatenation of R and S.
@@ -2197,7 +2197,7 @@ impl Array {
         }
 
         // 14. Perform ? Set(A, "length", 𝔽(actualDeleteCount), true).
-        arr.set("length", actual_delete_count, true, context)?;
+        arr.set(utf16!("length"), actual_delete_count, true, context)?;
 
         // 15. Let itemCount be the number of elements in items.
         let item_count = items.len() as u64;
@@ -2283,7 +2283,7 @@ impl Array {
 
         // 20. Perform ? Set(O, "length", 𝔽(len - actualDeleteCount + itemCount), true).
         o.set(
-            "length",
+            utf16!("length"),
             len - actual_delete_count + item_count,
             true,
             context,
@@ -2980,27 +2980,27 @@ impl Array {
         {
             let mut obj = unscopable_list.borrow_mut();
             // 2. Perform ! CreateDataPropertyOrThrow(unscopableList, "at", true).
-            obj.insert("at", true_prop.clone());
+            obj.insert(utf16!("at"), true_prop.clone());
             // 3. Perform ! CreateDataPropertyOrThrow(unscopableList, "copyWithin", true).
-            obj.insert("copyWithin", true_prop.clone());
+            obj.insert(utf16!("copyWithin"), true_prop.clone());
             // 4. Perform ! CreateDataPropertyOrThrow(unscopableList, "entries", true).
-            obj.insert("entries", true_prop.clone());
+            obj.insert(utf16!("entries"), true_prop.clone());
             // 5. Perform ! CreateDataPropertyOrThrow(unscopableList, "fill", true).
-            obj.insert("fill", true_prop.clone());
+            obj.insert(utf16!("fill"), true_prop.clone());
             // 6. Perform ! CreateDataPropertyOrThrow(unscopableList, "find", true).
-            obj.insert("find", true_prop.clone());
+            obj.insert(utf16!("find"), true_prop.clone());
             // 7. Perform ! CreateDataPropertyOrThrow(unscopableList, "findIndex", true).
-            obj.insert("findIndex", true_prop.clone());
+            obj.insert(utf16!("findIndex"), true_prop.clone());
             // 8. Perform ! CreateDataPropertyOrThrow(unscopableList, "flat", true).
-            obj.insert("flat", true_prop.clone());
+            obj.insert(utf16!("flat"), true_prop.clone());
             // 9. Perform ! CreateDataPropertyOrThrow(unscopableList, "flatMap", true).
-            obj.insert("flatMap", true_prop.clone());
+            obj.insert(utf16!("flatMap"), true_prop.clone());
             // 10. Perform ! CreateDataPropertyOrThrow(unscopableList, "includes", true).
-            obj.insert("includes", true_prop.clone());
+            obj.insert(utf16!("includes"), true_prop.clone());
             // 11. Perform ! CreateDataPropertyOrThrow(unscopableList, "keys", true).
-            obj.insert("keys", true_prop.clone());
+            obj.insert(utf16!("keys"), true_prop.clone());
             // 12. Perform ! CreateDataPropertyOrThrow(unscopableList, "values", true).
-            obj.insert("values", true_prop);
+            obj.insert(utf16!("values"), true_prop);
         }
 
         // 13. Return unscopableList.
diff --git a/boa_engine/src/builtins/array_buffer/mod.rs b/boa_engine/src/builtins/array_buffer/mod.rs
index 09e5f334b9..be5b99fedf 100644
--- a/boa_engine/src/builtins/array_buffer/mod.rs
+++ b/boa_engine/src/builtins/array_buffer/mod.rs
@@ -16,6 +16,7 @@ use crate::{
     error::JsNativeError,
     object::{internal_methods::get_prototype_from_constructor, JsObject, ObjectData},
     property::Attribute,
+    string::utf16,
     symbol::JsSymbol,
     value::{IntegerOrInfinity, Numeric},
     Context, JsArgs, JsResult, JsValue,
@@ -62,7 +63,12 @@ impl IntrinsicObject for ArrayBuffer {
             .build();
 
         BuiltInBuilder::from_standard_constructor::<Self>(intrinsics)
-            .accessor("byteLength", Some(get_byte_length), None, flag_attributes)
+            .accessor(
+                utf16!("byteLength"),
+                Some(get_byte_length),
+                None,
+                flag_attributes,
+            )
             .static_accessor(
                 JsSymbol::species(),
                 Some(get_species),
diff --git a/boa_engine/src/builtins/dataview/mod.rs b/boa_engine/src/builtins/dataview/mod.rs
index 4c1658e9c4..0999c5a1c9 100644
--- a/boa_engine/src/builtins/dataview/mod.rs
+++ b/boa_engine/src/builtins/dataview/mod.rs
@@ -13,6 +13,7 @@ use crate::{
     error::JsNativeError,
     object::{internal_methods::get_prototype_from_constructor, JsObject, ObjectData},
     property::Attribute,
+    string::utf16,
     symbol::JsSymbol,
     value::JsValue,
     Context, JsArgs, JsResult,
@@ -49,9 +50,19 @@ impl IntrinsicObject for DataView {
             .build();
 
         BuiltInBuilder::from_standard_constructor::<Self>(intrinsics)
-            .accessor("buffer", Some(get_buffer), None, flag_attributes)
-            .accessor("byteLength", Some(get_byte_length), None, flag_attributes)
-            .accessor("byteOffset", Some(get_byte_offset), None, flag_attributes)
+            .accessor(utf16!("buffer"), Some(get_buffer), None, flag_attributes)
+            .accessor(
+                utf16!("byteLength"),
+                Some(get_byte_length),
+                None,
+                flag_attributes,
+            )
+            .accessor(
+                utf16!("byteOffset"),
+                Some(get_byte_offset),
+                None,
+                flag_attributes,
+            )
             .method(Self::get_big_int64, "getBigInt64", 1)
             .method(Self::get_big_uint64, "getBigUint64", 1)
             .method(Self::get_float32, "getFloat32", 1)
diff --git a/boa_engine/src/builtins/date/mod.rs b/boa_engine/src/builtins/date/mod.rs
index 2aecb5bad3..aed1cbce60 100644
--- a/boa_engine/src/builtins/date/mod.rs
+++ b/boa_engine/src/builtins/date/mod.rs
@@ -1241,7 +1241,7 @@ impl Date {
         }
 
         // 4. Return ? Invoke(O, "toISOString").
-        let func = o.get("toISOString", context)?;
+        let func = o.get(utf16!("toISOString"), context)?;
         func.call(this, &[], context)
     }
 
diff --git a/boa_engine/src/builtins/error/aggregate.rs b/boa_engine/src/builtins/error/aggregate.rs
index 386dc55657..becc22f015 100644
--- a/boa_engine/src/builtins/error/aggregate.rs
+++ b/boa_engine/src/builtins/error/aggregate.rs
@@ -15,6 +15,7 @@ use crate::{
     context::intrinsics::{Intrinsics, StandardConstructor, StandardConstructors},
     object::{internal_methods::get_prototype_from_constructor, JsObject, ObjectData},
     property::{Attribute, PropertyDescriptorBuilder},
+    string::utf16,
     Context, JsArgs, JsResult, JsValue,
 };
 use boa_profiler::Profiler;
@@ -32,8 +33,8 @@ impl IntrinsicObject for AggregateError {
         BuiltInBuilder::from_standard_constructor::<Self>(intrinsics)
             .prototype(intrinsics.constructors().error().constructor())
             .inherits(Some(intrinsics.constructors().error().prototype()))
-            .property("name", Self::NAME, attribute)
-            .property("message", "", attribute)
+            .property(utf16!("name"), Self::NAME, attribute)
+            .property(utf16!("message"), "", attribute)
             .build();
     }
 
@@ -74,7 +75,7 @@ impl BuiltInConstructor for AggregateError {
             let msg = message.to_string(context)?;
 
             // b. Perform CreateNonEnumerableDataPropertyOrThrow(O, "message", msg).
-            o.create_non_enumerable_data_property_or_throw("message", msg, context);
+            o.create_non_enumerable_data_property_or_throw(utf16!("message"), msg, context);
         }
 
         // 4. Perform ? InstallErrorCause(O, options).
@@ -91,7 +92,7 @@ impl BuiltInConstructor for AggregateError {
         //      [[Value]]: CreateArrayFromList(errorsList)
         //    }).
         o.define_property_or_throw(
-            "errors",
+            utf16!("errors"),
             PropertyDescriptorBuilder::new()
                 .configurable(true)
                 .enumerable(false)
diff --git a/boa_engine/src/builtins/error/eval.rs b/boa_engine/src/builtins/error/eval.rs
index 46d0e66a2b..cd1581609d 100644
--- a/boa_engine/src/builtins/error/eval.rs
+++ b/boa_engine/src/builtins/error/eval.rs
@@ -16,6 +16,7 @@ use crate::{
     context::intrinsics::{Intrinsics, StandardConstructor, StandardConstructors},
     object::{internal_methods::get_prototype_from_constructor, JsObject, ObjectData},
     property::Attribute,
+    string::utf16,
     Context, JsArgs, JsResult, JsValue,
 };
 use boa_profiler::Profiler;
@@ -34,8 +35,8 @@ impl IntrinsicObject for EvalError {
         BuiltInBuilder::from_standard_constructor::<Self>(intrinsics)
             .prototype(intrinsics.constructors().error().constructor())
             .inherits(Some(intrinsics.constructors().error().prototype()))
-            .property("name", Self::NAME, attribute)
-            .property("message", "", attribute)
+            .property(utf16!("name"), Self::NAME, attribute)
+            .property(utf16!("message"), "", attribute)
             .build();
     }
 
@@ -73,7 +74,7 @@ impl BuiltInConstructor for EvalError {
             let msg = message.to_string(context)?;
 
             // b. Perform CreateNonEnumerableDataPropertyOrThrow(O, "message", msg).
-            o.create_non_enumerable_data_property_or_throw("message", msg, context);
+            o.create_non_enumerable_data_property_or_throw(utf16!("message"), msg, context);
         }
 
         // 4. Perform ? InstallErrorCause(O, options).
diff --git a/boa_engine/src/builtins/error/mod.rs b/boa_engine/src/builtins/error/mod.rs
index 1a610a3e56..6c11588e38 100644
--- a/boa_engine/src/builtins/error/mod.rs
+++ b/boa_engine/src/builtins/error/mod.rs
@@ -132,8 +132,8 @@ impl IntrinsicObject for Error {
 
         let attribute = Attribute::WRITABLE | Attribute::NON_ENUMERABLE | Attribute::CONFIGURABLE;
         BuiltInBuilder::from_standard_constructor::<Self>(intrinsics)
-            .property("name", Self::NAME, attribute)
-            .property("message", "", attribute)
+            .property(utf16!("name"), Self::NAME, attribute)
+            .property(utf16!("message"), "", attribute)
             .method(Self::to_string, "toString", 0)
             .build();
     }
@@ -175,7 +175,7 @@ impl BuiltInConstructor for Error {
             let msg = message.to_string(context)?;
 
             // b. Perform CreateNonEnumerableDataPropertyOrThrow(O, "message", msg).
-            o.create_non_enumerable_data_property_or_throw("message", msg, context);
+            o.create_non_enumerable_data_property_or_throw(utf16!("message"), msg, context);
         }
 
         // 4. Perform ? InstallErrorCause(O, options).
@@ -194,12 +194,12 @@ impl Error {
     ) -> JsResult<()> {
         // 1. If Type(options) is Object and ? HasProperty(options, "cause") is true, then
         if let Some(options) = options.as_object() {
-            if options.has_property("cause", context)? {
+            if options.has_property(utf16!("cause"), context)? {
                 // a. Let cause be ? Get(options, "cause").
-                let cause = options.get("cause", context)?;
+                let cause = options.get(utf16!("cause"), context)?;
 
                 // b. Perform CreateNonEnumerableDataPropertyOrThrow(O, "cause", cause).
-                o.create_non_enumerable_data_property_or_throw("cause", cause, context);
+                o.create_non_enumerable_data_property_or_throw(utf16!("cause"), cause, context);
             }
         }
 
diff --git a/boa_engine/src/builtins/error/range.rs b/boa_engine/src/builtins/error/range.rs
index 09976d92d6..e6618cf37b 100644
--- a/boa_engine/src/builtins/error/range.rs
+++ b/boa_engine/src/builtins/error/range.rs
@@ -14,6 +14,7 @@ use crate::{
     context::intrinsics::{Intrinsics, StandardConstructor, StandardConstructors},
     object::{internal_methods::get_prototype_from_constructor, JsObject, ObjectData},
     property::Attribute,
+    string::utf16,
     Context, JsArgs, JsResult, JsValue,
 };
 use boa_profiler::Profiler;
@@ -32,8 +33,8 @@ impl IntrinsicObject for RangeError {
         BuiltInBuilder::from_standard_constructor::<Self>(intrinsics)
             .prototype(intrinsics.constructors().error().constructor())
             .inherits(Some(intrinsics.constructors().error().prototype()))
-            .property("name", Self::NAME, attribute)
-            .property("message", "", attribute)
+            .property(utf16!("name"), Self::NAME, attribute)
+            .property(utf16!("message"), "", attribute)
             .build();
     }
 
@@ -71,7 +72,7 @@ impl BuiltInConstructor for RangeError {
             let msg = message.to_string(context)?;
 
             // b. Perform CreateNonEnumerableDataPropertyOrThrow(O, "message", msg).
-            o.create_non_enumerable_data_property_or_throw("message", msg, context);
+            o.create_non_enumerable_data_property_or_throw(utf16!("message"), msg, context);
         }
 
         // 4. Perform ? InstallErrorCause(O, options).
diff --git a/boa_engine/src/builtins/error/reference.rs b/boa_engine/src/builtins/error/reference.rs
index 59828f673c..710983db04 100644
--- a/boa_engine/src/builtins/error/reference.rs
+++ b/boa_engine/src/builtins/error/reference.rs
@@ -14,6 +14,7 @@ use crate::{
     context::intrinsics::{Intrinsics, StandardConstructor, StandardConstructors},
     object::{internal_methods::get_prototype_from_constructor, JsObject, ObjectData},
     property::Attribute,
+    string::utf16,
     Context, JsArgs, JsResult, JsValue,
 };
 use boa_profiler::Profiler;
@@ -31,8 +32,8 @@ impl IntrinsicObject for ReferenceError {
         BuiltInBuilder::from_standard_constructor::<Self>(intrinsics)
             .prototype(intrinsics.constructors().error().constructor())
             .inherits(Some(intrinsics.constructors().error().prototype()))
-            .property("name", Self::NAME, attribute)
-            .property("message", "", attribute)
+            .property(utf16!("name"), Self::NAME, attribute)
+            .property(utf16!("message"), "", attribute)
             .build();
     }
 
@@ -73,7 +74,7 @@ impl BuiltInConstructor for ReferenceError {
             let msg = message.to_string(context)?;
 
             // b. Perform CreateNonEnumerableDataPropertyOrThrow(O, "message", msg).
-            o.create_non_enumerable_data_property_or_throw("message", msg, context);
+            o.create_non_enumerable_data_property_or_throw(utf16!("message"), msg, context);
         }
 
         // 4. Perform ? InstallErrorCause(O, options).
diff --git a/boa_engine/src/builtins/error/syntax.rs b/boa_engine/src/builtins/error/syntax.rs
index f1270fb6ed..70811c4fca 100644
--- a/boa_engine/src/builtins/error/syntax.rs
+++ b/boa_engine/src/builtins/error/syntax.rs
@@ -16,6 +16,7 @@ use crate::{
     context::intrinsics::{Intrinsics, StandardConstructor, StandardConstructors},
     object::{internal_methods::get_prototype_from_constructor, JsObject, ObjectData},
     property::Attribute,
+    string::utf16,
     Context, JsArgs, JsResult, JsValue,
 };
 use boa_profiler::Profiler;
@@ -34,8 +35,8 @@ impl IntrinsicObject for SyntaxError {
         BuiltInBuilder::from_standard_constructor::<Self>(intrinsics)
             .prototype(intrinsics.constructors().error().constructor())
             .inherits(Some(intrinsics.constructors().error().prototype()))
-            .property("name", Self::NAME, attribute)
-            .property("message", "", attribute)
+            .property(utf16!("name"), Self::NAME, attribute)
+            .property(utf16!("message"), "", attribute)
             .build();
     }
 
@@ -76,7 +77,7 @@ impl BuiltInConstructor for SyntaxError {
             let msg = message.to_string(context)?;
 
             // b. Perform CreateNonEnumerableDataPropertyOrThrow(O, "message", msg).
-            o.create_non_enumerable_data_property_or_throw("message", msg, context);
+            o.create_non_enumerable_data_property_or_throw(utf16!("message"), msg, context);
         }
 
         // 4. Perform ? InstallErrorCause(O, options).
diff --git a/boa_engine/src/builtins/error/type.rs b/boa_engine/src/builtins/error/type.rs
index 336ef945e6..6a82717bf2 100644
--- a/boa_engine/src/builtins/error/type.rs
+++ b/boa_engine/src/builtins/error/type.rs
@@ -24,6 +24,7 @@ use crate::{
     native_function::NativeFunction,
     object::{internal_methods::get_prototype_from_constructor, JsObject, ObjectData},
     property::Attribute,
+    string::utf16,
     Context, JsArgs, JsResult, JsValue,
 };
 use boa_profiler::Profiler;
@@ -42,8 +43,8 @@ impl IntrinsicObject for TypeError {
         BuiltInBuilder::from_standard_constructor::<Self>(intrinsics)
             .prototype(intrinsics.constructors().error().constructor())
             .inherits(Some(intrinsics.constructors().error().prototype()))
-            .property("name", Self::NAME, attribute)
-            .property("message", "", attribute)
+            .property(utf16!("name"), Self::NAME, attribute)
+            .property(utf16!("message"), "", attribute)
             .build();
     }
 
@@ -81,7 +82,7 @@ impl BuiltInConstructor for TypeError {
             let msg = message.to_string(context)?;
 
             // b. Perform CreateNonEnumerableDataPropertyOrThrow(O, "message", msg).
-            o.create_non_enumerable_data_property_or_throw("message", msg, context);
+            o.create_non_enumerable_data_property_or_throw(utf16!("message"), msg, context);
         }
 
         // 4. Perform ? InstallErrorCause(O, options).
@@ -108,8 +109,8 @@ impl IntrinsicObject for ThrowTypeError {
 
         let obj = BuiltInBuilder::with_intrinsic::<Self>(intrinsics)
             .prototype(intrinsics.constructors().function().prototype())
-            .static_property("name", "ThrowTypeError", Attribute::empty())
-            .static_property("length", 0, Attribute::empty())
+            .static_property(utf16!("name"), "ThrowTypeError", Attribute::empty())
+            .static_property(utf16!("length"), 0, Attribute::empty())
             .build();
 
         let mut obj = obj.borrow_mut();
diff --git a/boa_engine/src/builtins/error/uri.rs b/boa_engine/src/builtins/error/uri.rs
index 2f849dfb6c..180a368d35 100644
--- a/boa_engine/src/builtins/error/uri.rs
+++ b/boa_engine/src/builtins/error/uri.rs
@@ -15,6 +15,7 @@ use crate::{
     context::intrinsics::{Intrinsics, StandardConstructor, StandardConstructors},
     object::{internal_methods::get_prototype_from_constructor, JsObject, ObjectData},
     property::Attribute,
+    string::utf16,
     Context, JsArgs, JsResult, JsValue,
 };
 use boa_profiler::Profiler;
@@ -33,8 +34,8 @@ impl IntrinsicObject for UriError {
         BuiltInBuilder::from_standard_constructor::<Self>(intrinsics)
             .prototype(intrinsics.constructors().error().constructor())
             .inherits(Some(intrinsics.constructors().error().prototype()))
-            .property("name", Self::NAME, attribute)
-            .property("message", "", attribute)
+            .property(utf16!("name"), Self::NAME, attribute)
+            .property(utf16!("message"), "", attribute)
             .build();
     }
 
@@ -72,7 +73,7 @@ impl BuiltInConstructor for UriError {
             let msg = message.to_string(context)?;
 
             // b. Perform CreateNonEnumerableDataPropertyOrThrow(O, "message", msg).
-            o.create_non_enumerable_data_property_or_throw("message", msg, context);
+            o.create_non_enumerable_data_property_or_throw(utf16!("message"), msg, context);
         }
 
         // 4. Perform ? InstallErrorCause(O, options).
diff --git a/boa_engine/src/builtins/function/arguments.rs b/boa_engine/src/builtins/function/arguments.rs
index dae9b0d23f..40b4c97acd 100644
--- a/boa_engine/src/builtins/function/arguments.rs
+++ b/boa_engine/src/builtins/function/arguments.rs
@@ -2,6 +2,7 @@ use crate::{
     environments::DeclarativeEnvironment,
     object::{JsObject, ObjectData},
     property::PropertyDescriptor,
+    string::utf16,
     symbol::{self, JsSymbol},
     Context, JsValue,
 };
@@ -87,7 +88,7 @@ impl Arguments {
         // 4. Perform DefinePropertyOrThrow(obj, "length", PropertyDescriptor { [[Value]]: 𝔽(len),
         // [[Writable]]: true, [[Enumerable]]: false, [[Configurable]]: true }).
         obj.define_property_or_throw(
-            "length",
+            utf16!("length"),
             PropertyDescriptor::builder()
                 .value(len)
                 .writable(true)
@@ -129,7 +130,7 @@ impl Arguments {
         // [[Get]]: %ThrowTypeError%, [[Set]]: %ThrowTypeError%, [[Enumerable]]: false,
         // [[Configurable]]: false }).
         obj.define_property_or_throw(
-            "callee",
+            utf16!("callee"),
             PropertyDescriptor::builder()
                 .get(throw_type_error.clone())
                 .set(throw_type_error)
@@ -249,7 +250,7 @@ impl Arguments {
         // 16. Perform ! DefinePropertyOrThrow(obj, "length", PropertyDescriptor { [[Value]]: 𝔽(len),
         // [[Writable]]: true, [[Enumerable]]: false, [[Configurable]]: true }).
         obj.define_property_or_throw(
-            "length",
+            utf16!("length"),
             PropertyDescriptor::builder()
                 .value(len)
                 .writable(true)
@@ -277,7 +278,7 @@ impl Arguments {
         // 21. Perform ! DefinePropertyOrThrow(obj, "callee", PropertyDescriptor {
         // [[Value]]: func, [[Writable]]: true, [[Enumerable]]: false, [[Configurable]]: true }).
         obj.define_property_or_throw(
-            "callee",
+            utf16!("callee"),
             PropertyDescriptor::builder()
                 .value(func.clone())
                 .writable(true)
diff --git a/boa_engine/src/builtins/function/mod.rs b/boa_engine/src/builtins/function/mod.rs
index 2676d8585b..45a0152878 100644
--- a/boa_engine/src/builtins/function/mod.rs
+++ b/boa_engine/src/builtins/function/mod.rs
@@ -419,13 +419,13 @@ impl IntrinsicObject for BuiltInFunctionObject {
             .method(Self::to_string, "toString", 0)
             .property(JsSymbol::has_instance(), has_instance, Attribute::default())
             .accessor(
-                "caller",
+                utf16!("caller"),
                 Some(throw_type_error.clone()),
                 Some(throw_type_error.clone()),
                 Attribute::CONFIGURABLE,
             )
             .accessor(
-                "arguments",
+                utf16!("arguments"),
                 Some(throw_type_error.clone()),
                 Some(throw_type_error),
                 Attribute::CONFIGURABLE,
@@ -734,9 +734,9 @@ impl BuiltInFunctionObject {
 
         // 5. Let targetHasLength be ? HasOwnProperty(Target, "length").
         // 6. If targetHasLength is true, then
-        if target.has_own_property("length", context)? {
+        if target.has_own_property(utf16!("length"), context)? {
             // a. Let targetLen be ? Get(Target, "length").
-            let target_len = target.get("length", context)?;
+            let target_len = target.get(utf16!("length"), context)?;
             // b. If Type(targetLen) is Number, then
             if target_len.is_number() {
                 // 1. Let targetLenAsInt be ! ToIntegerOrInfinity(targetLen).
@@ -761,7 +761,7 @@ impl BuiltInFunctionObject {
 
         // 7. Perform ! SetFunctionLength(F, L).
         f.define_property_or_throw(
-            "length",
+            utf16!("length"),
             PropertyDescriptor::builder()
                 .value(l)
                 .writable(false)
@@ -772,7 +772,7 @@ impl BuiltInFunctionObject {
         .expect("defining the `length` property for a new object should not fail");
 
         // 8. Let targetName be ? Get(Target, "name").
-        let target_name = target.get("name", context)?;
+        let target_name = target.get(utf16!("name"), context)?;
 
         // 9. If Type(targetName) is not String, set targetName to the empty String.
         let target_name = target_name
@@ -825,7 +825,7 @@ impl BuiltInFunctionObject {
             let value = this
                 .as_object()
                 .expect("checked that `this` was an object above")
-                .get("name", &mut *context)?;
+                .get(utf16!("name"), &mut *context)?;
             if value.is_null_or_undefined() {
                 None
             } else {
@@ -923,7 +923,7 @@ pub(crate) fn set_function_name(
     // [[Writable]]: false, [[Enumerable]]: false, [[Configurable]]: true }).
     function
         .define_property_or_throw(
-            "name",
+            utf16!("name"),
             PropertyDescriptor::builder()
                 .value(name)
                 .writable(false)
diff --git a/boa_engine/src/builtins/intl/collator/mod.rs b/boa_engine/src/builtins/intl/collator/mod.rs
index 5eef808e90..5af7149d1b 100644
--- a/boa_engine/src/builtins/intl/collator/mod.rs
+++ b/boa_engine/src/builtins/intl/collator/mod.rs
@@ -22,6 +22,7 @@ use crate::{
         JsObject, ObjectData,
     },
     property::Attribute,
+    string::utf16,
     symbol::JsSymbol,
     Context, JsArgs, JsNativeError, JsResult, JsValue,
 };
@@ -173,7 +174,12 @@ impl IntrinsicObject for Collator {
                 "Intl.Collator",
                 Attribute::CONFIGURABLE,
             )
-            .accessor("compare", Some(compare), None, Attribute::CONFIGURABLE)
+            .accessor(
+                utf16!("compare"),
+                Some(compare),
+                None,
+                Attribute::CONFIGURABLE,
+            )
             .method(Self::resolved_options, "resolvedOptions", 0)
             .build();
     }
@@ -234,29 +240,31 @@ impl BuiltInConstructor for Collator {
         //     a. Let localeData be %Collator%.[[SortLocaleData]].
         // 6. Else,
         //     a. Let localeData be %Collator%.[[SearchLocaleData]].
-        let usage = get_option::<Usage>(&options, "usage", false, context)?.unwrap_or_default();
+        let usage =
+            get_option::<Usage>(&options, utf16!("usage"), false, context)?.unwrap_or_default();
 
         // 7. Let opt be a new Record.
         // 8. Let matcher be ? GetOption(options, "localeMatcher", string, « "lookup", "best fit" », "best fit").
         // 9. Set opt.[[localeMatcher]] to matcher.
-        let matcher = get_option::<LocaleMatcher>(&options, "localeMatcher", false, context)?
-            .unwrap_or_default();
+        let matcher =
+            get_option::<LocaleMatcher>(&options, utf16!("localeMatcher"), false, context)?
+                .unwrap_or_default();
 
         // 10. Let collation be ? GetOption(options, "collation", string, empty, undefined).
         // 11. If collation is not undefined, then
         //     a. If collation does not match the Unicode Locale Identifier type nonterminal, throw a RangeError exception.
         // 12. Set opt.[[co]] to collation.
-        let collation = get_option::<Value>(&options, "collation", false, context)?;
+        let collation = get_option::<Value>(&options, utf16!("collation"), false, context)?;
 
         // 13. Let numeric be ? GetOption(options, "numeric", boolean, empty, undefined).
         // 14. If numeric is not undefined, then
         //     a. Let numeric be ! ToString(numeric).
         // 15. Set opt.[[kn]] to numeric.
-        let numeric = get_option::<bool>(&options, "numeric", false, context)?;
+        let numeric = get_option::<bool>(&options, utf16!("numeric"), false, context)?;
 
         // 16. Let caseFirst be ? GetOption(options, "caseFirst", string, « "upper", "lower", "false" », undefined).
         // 17. Set opt.[[kf]] to caseFirst.
-        let case_first = get_option::<CaseFirst>(&options, "caseFirst", false, context)?;
+        let case_first = get_option::<CaseFirst>(&options, utf16!("caseFirst"), false, context)?;
 
         let mut intl_options = IntlOptions {
             matcher,
@@ -305,20 +313,22 @@ impl BuiltInConstructor for Collator {
 
         // 26. Let sensitivity be ? GetOption(options, "sensitivity", string, « "base", "accent", "case", "variant" », undefined).
         // 28. Set collator.[[Sensitivity]] to sensitivity.
-        let sensitivity = get_option::<Sensitivity>(&options, "sensitivity", false, context)?
-            // 27. If sensitivity is undefined, then
-            //     a. If usage is "sort", then
-            //         i. Let sensitivity be "variant".
-            //     b. Else,
-            //         i. Let dataLocale be r.[[dataLocale]].
-            //         ii. Let dataLocaleData be localeData.[[<dataLocale>]].
-            //         iii. Let sensitivity be dataLocaleData.[[sensitivity]].
-            .or_else(|| (usage == Usage::Sort).then_some(Sensitivity::Variant));
+        let sensitivity =
+            get_option::<Sensitivity>(&options, utf16!("sensitivity"), false, context)?
+                // 27. If sensitivity is undefined, then
+                //     a. If usage is "sort", then
+                //         i. Let sensitivity be "variant".
+                //     b. Else,
+                //         i. Let dataLocale be r.[[dataLocale]].
+                //         ii. Let dataLocaleData be localeData.[[<dataLocale>]].
+                //         iii. Let sensitivity be dataLocaleData.[[sensitivity]].
+                .or_else(|| (usage == Usage::Sort).then_some(Sensitivity::Variant));
 
         // 29. Let ignorePunctuation be ? GetOption(options, "ignorePunctuation", boolean, empty, false).
         // 30. Set collator.[[IgnorePunctuation]] to ignorePunctuation.
         let ignore_punctuation =
-            get_option::<bool>(&options, "ignorePunctuation", false, context)?.unwrap_or_default();
+            get_option::<bool>(&options, utf16!("ignorePunctuation"), false, context)?
+                .unwrap_or_default();
 
         let (strength, case_level) = sensitivity.map(Sensitivity::to_collator_options).unzip();
 
@@ -504,11 +514,11 @@ impl Collator {
         //         i. Perform ! CreateDataPropertyOrThrow(options, p, v).
         // 5. Return options.
         options
-            .create_data_property_or_throw("locale", collator.locale.to_string(), context)
+            .create_data_property_or_throw(utf16!("locale"), collator.locale.to_string(), context)
             .expect("operation must not fail per the spec");
         options
             .create_data_property_or_throw(
-                "usage",
+                utf16!("usage"),
                 match collator.usage {
                     Usage::Search => "search",
                     Usage::Sort => "sort",
@@ -518,7 +528,7 @@ impl Collator {
             .expect("operation must not fail per the spec");
         options
             .create_data_property_or_throw(
-                "sensitivity",
+                utf16!("sensitivity"),
                 match collator.sensitivity {
                     Sensitivity::Base => "base",
                     Sensitivity::Accent => "accent",
@@ -530,21 +540,25 @@ impl Collator {
             .expect("operation must not fail per the spec");
         options
             .create_data_property_or_throw(
-                "ignorePunctuation",
+                utf16!("ignorePunctuation"),
                 collator.ignore_punctuation,
                 context,
             )
             .expect("operation must not fail per the spec");
         options
-            .create_data_property_or_throw("collation", collator.collation.to_string(), context)
+            .create_data_property_or_throw(
+                utf16!("collation"),
+                collator.collation.to_string(),
+                context,
+            )
             .expect("operation must not fail per the spec");
         options
-            .create_data_property_or_throw("numeric", collator.numeric, context)
+            .create_data_property_or_throw(utf16!("numeric"), collator.numeric, context)
             .expect("operation must not fail per the spec");
         if let Some(kf) = collator.case_first {
             options
                 .create_data_property_or_throw(
-                    "caseFirst",
+                    utf16!("caseFirst"),
                     match kf {
                         CaseFirst::Off => "false",
                         CaseFirst::LowerFirst => "lower",
diff --git a/boa_engine/src/builtins/intl/date_time_format.rs b/boa_engine/src/builtins/intl/date_time_format.rs
index 72293c1ccf..ca38623e9a 100644
--- a/boa_engine/src/builtins/intl/date_time_format.rs
+++ b/boa_engine/src/builtins/intl/date_time_format.rs
@@ -13,6 +13,7 @@ use crate::{
     error::JsNativeError,
     js_string,
     object::{internal_methods::get_prototype_from_constructor, JsObject, ObjectData},
+    string::utf16,
     Context, JsResult, JsString, JsValue,
 };
 
@@ -182,7 +183,12 @@ pub(crate) fn to_date_time_options(
     // 4. If required is "date" or "any", then
     if [DateTimeReqs::Date, DateTimeReqs::AnyAll].contains(required) {
         // a. For each property name prop of « "weekday", "year", "month", "day" », do
-        for property in ["weekday", "year", "month", "day"] {
+        for property in [
+            utf16!("weekday"),
+            utf16!("year"),
+            utf16!("month"),
+            utf16!("day"),
+        ] {
             // i. Let value be ? Get(options, prop).
             let value = options.get(property, context)?;
 
@@ -198,11 +204,11 @@ pub(crate) fn to_date_time_options(
         // a. For each property name prop of « "dayPeriod", "hour", "minute", "second",
         // "fractionalSecondDigits" », do
         for property in [
-            "dayPeriod",
-            "hour",
-            "minute",
-            "second",
-            "fractionalSecondDigits",
+            utf16!("dayPeriod"),
+            utf16!("hour"),
+            utf16!("minute"),
+            utf16!("second"),
+            utf16!("fractionalSecondDigits"),
         ] {
             // i. Let value be ? Get(options, prop).
             let value = options.get(property, context)?;
@@ -215,10 +221,10 @@ pub(crate) fn to_date_time_options(
     }
 
     // 6. Let dateStyle be ? Get(options, "dateStyle").
-    let date_style = options.get("dateStyle", context)?;
+    let date_style = options.get(utf16!("dateStyle"), context)?;
 
     // 7. Let timeStyle be ? Get(options, "timeStyle").
-    let time_style = options.get("timeStyle", context)?;
+    let time_style = options.get(utf16!("timeStyle"), context)?;
 
     // 8. If dateStyle is not undefined or timeStyle is not undefined, let needDefaults be false.
     if !date_style.is_undefined() || !time_style.is_undefined() {
@@ -244,7 +250,7 @@ pub(crate) fn to_date_time_options(
     // 11. If needDefaults is true and defaults is either "date" or "all", then
     if need_defaults && [DateTimeReqs::Date, DateTimeReqs::AnyAll].contains(defaults) {
         // a. For each property name prop of « "year", "month", "day" », do
-        for property in ["year", "month", "day"] {
+        for property in [utf16!("year"), utf16!("month"), utf16!("day")] {
             // i. Perform ? CreateDataPropertyOrThrow(options, prop, "numeric").
             options.create_data_property_or_throw(property, "numeric", context)?;
         }
@@ -253,7 +259,7 @@ pub(crate) fn to_date_time_options(
     // 12. If needDefaults is true and defaults is either "time" or "all", then
     if need_defaults && [DateTimeReqs::Time, DateTimeReqs::AnyAll].contains(defaults) {
         // a. For each property name prop of « "hour", "minute", "second" », do
-        for property in ["hour", "minute", "second"] {
+        for property in [utf16!("hour"), utf16!("minute"), utf16!("second")] {
             // i. Perform ? CreateDataPropertyOrThrow(options, prop, "numeric").
             options.create_data_property_or_throw(property, "numeric", context)?;
         }
diff --git a/boa_engine/src/builtins/intl/list_format/mod.rs b/boa_engine/src/builtins/intl/list_format/mod.rs
index d381962f02..af3575c49e 100644
--- a/boa_engine/src/builtins/intl/list_format/mod.rs
+++ b/boa_engine/src/builtins/intl/list_format/mod.rs
@@ -10,6 +10,7 @@ use crate::{
     context::intrinsics::{Intrinsics, StandardConstructor, StandardConstructors},
     object::{internal_methods::get_prototype_from_constructor, JsObject, ObjectData},
     property::Attribute,
+    string::utf16,
     symbol::JsSymbol,
     Context, JsArgs, JsNativeError, JsResult, JsString, JsValue,
 };
@@ -110,8 +111,9 @@ impl BuiltInConstructor for ListFormat {
 
         // 5. Let opt be a new Record.
         // 6. Let matcher be ? GetOption(options, "localeMatcher", string, « "lookup", "best fit" », "best fit").
-        let matcher = get_option::<LocaleMatcher>(&options, "localeMatcher", false, context)?
-            .unwrap_or_default();
+        let matcher =
+            get_option::<LocaleMatcher>(&options, utf16!("localeMatcher"), false, context)?
+                .unwrap_or_default();
 
         // 7. Set opt.[[localeMatcher]] to matcher.
         // 8. Let localeData be %ListFormat%.[[LocaleData]].
@@ -128,12 +130,12 @@ impl BuiltInConstructor for ListFormat {
 
         // 11. Let type be ? GetOption(options, "type", string, « "conjunction", "disjunction", "unit" », "conjunction").
         // 12. Set listFormat.[[Type]] to type.
-        let typ =
-            get_option::<ListFormatType>(&options, "type", false, context)?.unwrap_or_default();
+        let typ = get_option::<ListFormatType>(&options, utf16!("type"), false, context)?
+            .unwrap_or_default();
 
         // 13. Let style be ? GetOption(options, "style", string, « "long", "short", "narrow" », "long").
         // 14. Set listFormat.[[Style]] to style.
-        let style = get_option::<ListLength>(&options, "style", false, context)?
+        let style = get_option::<ListLength>(&options, utf16!("style"), false, context)?
             .unwrap_or(ListLength::Wide);
 
         // 15. Let dataLocale be r.[[dataLocale]].
@@ -361,11 +363,11 @@ impl ListFormat {
             );
 
             // b. Perform ! CreateDataPropertyOrThrow(O, "type", part.[[Type]]).
-            o.create_data_property_or_throw("type", part.typ(), context)
+            o.create_data_property_or_throw(utf16!("type"), part.typ(), context)
                 .expect("operation must not fail per the spec");
 
             // c. Perform ! CreateDataPropertyOrThrow(O, "value", part.[[Value]]).
-            o.create_data_property_or_throw("value", part.value(), context)
+            o.create_data_property_or_throw(utf16!("value"), part.value(), context)
                 .expect("operation must not fail per the spec");
 
             // d. Perform ! CreateDataPropertyOrThrow(result, ! ToString(n), O).
@@ -418,11 +420,11 @@ impl ListFormat {
         //     c. Assert: v is not undefined.
         //     d. Perform ! CreateDataPropertyOrThrow(options, p, v).
         options
-            .create_data_property_or_throw("locale", lf.locale.to_string(), context)
+            .create_data_property_or_throw(utf16!("locale"), lf.locale.to_string(), context)
             .expect("operation must not fail per the spec");
         options
             .create_data_property_or_throw(
-                "type",
+                utf16!("type"),
                 match lf.typ {
                     ListFormatType::Conjunction => "conjunction",
                     ListFormatType::Disjunction => "disjunction",
@@ -433,7 +435,7 @@ impl ListFormat {
             .expect("operation must not fail per the spec");
         options
             .create_data_property_or_throw(
-                "style",
+                utf16!("style"),
                 match lf.style {
                     ListLength::Wide => "long",
                     ListLength::Short => "short",
diff --git a/boa_engine/src/builtins/intl/locale/mod.rs b/boa_engine/src/builtins/intl/locale/mod.rs
index 2267b1b4b8..264335c0ac 100644
--- a/boa_engine/src/builtins/intl/locale/mod.rs
+++ b/boa_engine/src/builtins/intl/locale/mod.rs
@@ -1,3 +1,4 @@
+use crate::string::utf16;
 use boa_profiler::Profiler;
 use icu_collator::CaseFirst;
 use icu_datetime::options::preferences::HourCycle;
@@ -93,21 +94,66 @@ impl IntrinsicObject for Locale {
             .method(Self::maximize, "maximize", 0)
             .method(Self::minimize, "minimize", 0)
             .method(Self::to_string, "toString", 0)
-            .accessor("baseName", Some(base_name), None, Attribute::CONFIGURABLE)
-            .accessor("calendar", Some(calendar), None, Attribute::CONFIGURABLE)
-            .accessor("caseFirst", Some(case_first), None, Attribute::CONFIGURABLE)
-            .accessor("collation", Some(collation), None, Attribute::CONFIGURABLE)
-            .accessor("hourCycle", Some(hour_cycle), None, Attribute::CONFIGURABLE)
-            .accessor("numeric", Some(numeric), None, Attribute::CONFIGURABLE)
             .accessor(
-                "numberingSystem",
+                utf16!("baseName"),
+                Some(base_name),
+                None,
+                Attribute::CONFIGURABLE,
+            )
+            .accessor(
+                utf16!("calendar"),
+                Some(calendar),
+                None,
+                Attribute::CONFIGURABLE,
+            )
+            .accessor(
+                utf16!("caseFirst"),
+                Some(case_first),
+                None,
+                Attribute::CONFIGURABLE,
+            )
+            .accessor(
+                utf16!("collation"),
+                Some(collation),
+                None,
+                Attribute::CONFIGURABLE,
+            )
+            .accessor(
+                utf16!("hourCycle"),
+                Some(hour_cycle),
+                None,
+                Attribute::CONFIGURABLE,
+            )
+            .accessor(
+                utf16!("numeric"),
+                Some(numeric),
+                None,
+                Attribute::CONFIGURABLE,
+            )
+            .accessor(
+                utf16!("numberingSystem"),
                 Some(numbering_system),
                 None,
                 Attribute::CONFIGURABLE,
             )
-            .accessor("language", Some(language), None, Attribute::CONFIGURABLE)
-            .accessor("script", Some(script), None, Attribute::CONFIGURABLE)
-            .accessor("region", Some(region), None, Attribute::CONFIGURABLE)
+            .accessor(
+                utf16!("language"),
+                Some(language),
+                None,
+                Attribute::CONFIGURABLE,
+            )
+            .accessor(
+                utf16!("script"),
+                Some(script),
+                None,
+                Attribute::CONFIGURABLE,
+            )
+            .accessor(
+                utf16!("region"),
+                Some(region),
+                None,
+                Attribute::CONFIGURABLE,
+            )
             .build();
     }
 
@@ -197,7 +243,7 @@ impl BuiltInConstructor for Locale {
             // 3. If ! IsStructurallyValidLanguageTag(tag) is false, throw a RangeError exception.
             // 4. Let language be ? GetOption(options, "language", string, empty, undefined).
             // 5. If language is not undefined, then
-            let language = get_option::<JsString>(options, "language", false, context)?
+            let language = get_option::<JsString>(options, utf16!("language"), false, context)?
                 // a. If language does not match the unicode_language_subtag production, throw a RangeError exception.
                 .map(|s| s.to_std_string_escaped().parse::<Language>())
                 .transpose()
@@ -205,7 +251,7 @@ impl BuiltInConstructor for Locale {
 
             // 6. Let script be ? GetOption(options, "script", string, empty, undefined).
             // 7. If script is not undefined, then
-            let script = get_option::<JsString>(options, "script", false, context)?
+            let script = get_option::<JsString>(options, utf16!("script"), false, context)?
                 .map(|s| s.to_std_string_escaped().parse::<Script>())
                 .transpose()
                 // a. If script does not match the unicode_script_subtag production, throw a RangeError exception.
@@ -213,7 +259,7 @@ impl BuiltInConstructor for Locale {
 
             // 8. Let region be ? GetOption(options, "region", string, empty, undefined).
             // 9. If region is not undefined, then
-            let region = get_option::<JsString>(options, "region", false, context)?
+            let region = get_option::<JsString>(options, utf16!("region"), false, context)?
                 .map(|s| s.to_std_string_escaped().parse::<Region>())
                 .transpose()
                 // a. If region does not match the unicode_region_subtag production, throw a RangeError exception.
@@ -259,38 +305,42 @@ impl BuiltInConstructor for Locale {
         // 14. If calendar is not undefined, then
         // 15. Set opt.[[ca]] to calendar.
         //     a. If calendar does not match the Unicode Locale Identifier type nonterminal, throw a RangeError exception.
-        let ca = get_option::<Value>(options, "calendar", false, context)?;
+        let ca = get_option::<Value>(options, utf16!("calendar"), false, context)?;
 
         // 16. Let collation be ? GetOption(options, "collation", string, empty, undefined).
         // 17. If collation is not undefined, then
         // 18. Set opt.[[co]] to collation.
         //     a. If collation does not match the Unicode Locale Identifier type nonterminal, throw a RangeError exception.
-        let co = get_option::<Value>(options, "collation", false, context)?;
+        let co = get_option::<Value>(options, utf16!("collation"), false, context)?;
 
         // 19. Let hc be ? GetOption(options, "hourCycle", string, « "h11", "h12", "h23", "h24" », undefined).
         // 20. Set opt.[[hc]] to hc.
         let hc =
-            get_option::<HourCycle>(options, "hourCycle", false, context)?.map(|hc| match hc {
-                HourCycle::H24 => value!("h24"),
-                HourCycle::H23 => value!("h23"),
-                HourCycle::H12 => value!("h12"),
-                HourCycle::H11 => value!("h11"),
-            });
+            get_option::<HourCycle>(options, utf16!("hourCycle"), false, context)?.map(
+                |hc| match hc {
+                    HourCycle::H24 => value!("h24"),
+                    HourCycle::H23 => value!("h23"),
+                    HourCycle::H12 => value!("h12"),
+                    HourCycle::H11 => value!("h11"),
+                },
+            );
 
         // 21. Let kf be ? GetOption(options, "caseFirst", string, « "upper", "lower", "false" », undefined).
         // 22. Set opt.[[kf]] to kf.
         let kf =
-            get_option::<CaseFirst>(options, "caseFirst", false, context)?.map(|kf| match kf {
-                CaseFirst::UpperFirst => value!("upper"),
-                CaseFirst::LowerFirst => value!("lower"),
-                CaseFirst::Off => value!("false"),
-                _ => unreachable!(),
-            });
+            get_option::<CaseFirst>(options, utf16!("caseFirst"), false, context)?.map(
+                |kf| match kf {
+                    CaseFirst::UpperFirst => value!("upper"),
+                    CaseFirst::LowerFirst => value!("lower"),
+                    CaseFirst::Off => value!("false"),
+                    _ => unreachable!(),
+                },
+            );
 
         // 23. Let kn be ? GetOption(options, "numeric", boolean, empty, undefined).
         // 24. If kn is not undefined, set kn to ! ToString(kn).
         // 25. Set opt.[[kn]] to kn.
-        let kn = get_option::<bool>(options, "numeric", false, context)?.map(|b| {
+        let kn = get_option::<bool>(options, utf16!("numeric"), false, context)?.map(|b| {
             if b {
                 value!("true")
             } else {
@@ -302,7 +352,7 @@ impl BuiltInConstructor for Locale {
         // 27. If numberingSystem is not undefined, then
         // 28. Set opt.[[nu]] to numberingSystem.
         //     a. If numberingSystem does not match the Unicode Locale Identifier type nonterminal, throw a RangeError exception.
-        let nu = get_option::<Value>(options, "numberingSystem", false, context)?;
+        let nu = get_option::<Value>(options, utf16!("numberingSystem"), false, context)?;
 
         // 29. Let r be ! ApplyUnicodeExtensionToTag(tag, opt, relevantExtensionKeys).
         // 30. Set locale.[[Locale]] to r.[[locale]].
diff --git a/boa_engine/src/builtins/intl/locale/utils.rs b/boa_engine/src/builtins/intl/locale/utils.rs
index 42f49bfc43..c3b1bb0961 100644
--- a/boa_engine/src/builtins/intl/locale/utils.rs
+++ b/boa_engine/src/builtins/intl/locale/utils.rs
@@ -8,6 +8,7 @@ use crate::{
     },
     context::{icu::Icu, BoaProvider},
     object::JsObject,
+    string::utf16,
     Context, JsNativeError, JsResult, JsValue,
 };
 
@@ -497,8 +498,8 @@ where
     let options = coerce_options_to_object(options, context)?;
 
     // 2. Let matcher be ? GetOption(options, "localeMatcher", string, « "lookup", "best fit" », "best fit").
-    let matcher =
-        get_option::<LocaleMatcher>(&options, "localeMatcher", false, context)?.unwrap_or_default();
+    let matcher = get_option::<LocaleMatcher>(&options, utf16!("localeMatcher"), false, context)?
+        .unwrap_or_default();
 
     let elements = match matcher {
         // 4. Else,
diff --git a/boa_engine/src/builtins/intl/options.rs b/boa_engine/src/builtins/intl/options.rs
index c444fc87b2..e08a949b75 100644
--- a/boa_engine/src/builtins/intl/options.rs
+++ b/boa_engine/src/builtins/intl/options.rs
@@ -120,7 +120,7 @@ impl OptionType for CaseFirst {
 /// [spec]: https://tc39.es/ecma402/#sec-getoption
 pub(super) fn get_option<T: OptionType>(
     options: &JsObject,
-    property: &str,
+    property: &[u16],
     required: bool,
     context: &mut Context<'_>,
 ) -> JsResult<Option<T>> {
@@ -157,7 +157,7 @@ pub(super) fn get_option<T: OptionType>(
 #[allow(unused)]
 pub(super) fn get_number_option(
     options: &JsObject,
-    property: &str,
+    property: &[u16],
     minimum: f64,
     maximum: f64,
     fallback: Option<f64>,
diff --git a/boa_engine/src/builtins/iterable/async_from_sync_iterator.rs b/boa_engine/src/builtins/iterable/async_from_sync_iterator.rs
index 96fa184b0d..abb7e6492e 100644
--- a/boa_engine/src/builtins/iterable/async_from_sync_iterator.rs
+++ b/boa_engine/src/builtins/iterable/async_from_sync_iterator.rs
@@ -7,6 +7,7 @@ use crate::{
     context::intrinsics::Intrinsics,
     native_function::NativeFunction,
     object::{FunctionObjectBuilder, JsObject, ObjectData},
+    string::utf16,
     Context, JsArgs, JsNativeError, JsResult, JsValue,
 };
 use boa_gc::{Finalize, Trace};
@@ -70,7 +71,7 @@ impl AsyncFromSyncIterator {
 
         // 3. Let nextMethod be ! Get(asyncIterator, "next").
         let next_method = async_iterator
-            .get("next", context)
+            .get(utf16!("next"), context)
             .expect("async from sync iterator prototype must have next method");
 
         // 4. Let iteratorRecord be the Iterator Record { [[Iterator]]: asyncIterator, [[NextMethod]]: nextMethod, [[Done]]: false }.
@@ -155,7 +156,7 @@ impl AsyncFromSyncIterator {
         .expect("cannot fail with promise constructor");
 
         // 5. Let return be Completion(GetMethod(syncIterator, "return")).
-        let r#return = sync_iterator.get_method("return", context);
+        let r#return = sync_iterator.get_method(utf16!("return"), context);
 
         // 6. IfAbruptRejectPromise(return, promiseCapability).
         if_abrupt_reject_promise!(r#return, promise_capability, context);
@@ -253,7 +254,7 @@ impl AsyncFromSyncIterator {
         .expect("cannot fail with promise constructor");
 
         // 5. Let throw be Completion(GetMethod(syncIterator, "throw")).
-        let throw = sync_iterator.get_method("throw", context);
+        let throw = sync_iterator.get_method(utf16!("throw"), context);
 
         // 6. IfAbruptRejectPromise(throw, promiseCapability).
         if_abrupt_reject_promise!(throw, promise_capability, context);
diff --git a/boa_engine/src/builtins/iterable/mod.rs b/boa_engine/src/builtins/iterable/mod.rs
index a6c3e5a7ae..b361fe4d81 100644
--- a/boa_engine/src/builtins/iterable/mod.rs
+++ b/boa_engine/src/builtins/iterable/mod.rs
@@ -5,6 +5,7 @@ use crate::{
     context::intrinsics::Intrinsics,
     error::JsNativeError,
     object::JsObject,
+    string::utf16,
     symbol::JsSymbol,
     Context, JsResult, JsValue,
 };
@@ -188,10 +189,10 @@ pub fn create_iter_result_object(value: JsValue, done: bool, context: &mut Conte
     let obj = JsObject::with_object_proto(context);
 
     // 3. Perform ! CreateDataPropertyOrThrow(obj, "value", value).
-    obj.create_data_property_or_throw("value", value, context)
+    obj.create_data_property_or_throw(utf16!("value"), value, context)
         .expect("this CreateDataPropertyOrThrow call must not fail");
     // 4. Perform ! CreateDataPropertyOrThrow(obj, "done", done).
-    obj.create_data_property_or_throw("done", done, context)
+    obj.create_data_property_or_throw(utf16!("done"), done, context)
         .expect("this CreateDataPropertyOrThrow call must not fail");
     // 5. Return obj.
     obj.into()
@@ -265,7 +266,7 @@ impl JsValue {
         })?;
 
         // 5. Let nextMethod be ? GetV(iterator, "next").
-        let next_method = iterator.get_v("next", context)?;
+        let next_method = iterator.get_v(utf16!("next"), context)?;
 
         // 6. Let iteratorRecord be the Record { [[Iterator]]: iterator, [[NextMethod]]: nextMethod, [[Done]]: false }.
         // 7. Return iteratorRecord.
@@ -301,7 +302,7 @@ impl IteratorResult {
     #[inline]
     pub fn complete(&self, context: &mut Context<'_>) -> JsResult<bool> {
         // 1. Return ToBoolean(? Get(iterResult, "done")).
-        Ok(self.object.get("done", context)?.to_boolean())
+        Ok(self.object.get(utf16!("done"), context)?.to_boolean())
     }
 
     /// `IteratorValue ( iterResult )`
@@ -317,7 +318,7 @@ impl IteratorResult {
     #[inline]
     pub fn value(&self, context: &mut Context<'_>) -> JsResult<JsValue> {
         // 1. Return ? Get(iterResult, "value").
-        self.object.get("value", context)
+        self.object.get(utf16!("value"), context)
     }
 }
 
@@ -478,7 +479,7 @@ impl IteratorRecord {
         let iterator = &self.iterator;
 
         // 3. Let innerResult be Completion(GetMethod(iterator, "return")).
-        let inner_result = iterator.get_method("return", context);
+        let inner_result = iterator.get_method(utf16!("return"), context);
 
         // 4. If innerResult.[[Type]] is normal, then
         let inner_result = match inner_result {
diff --git a/boa_engine/src/builtins/json/mod.rs b/boa_engine/src/builtins/json/mod.rs
index 92a328a72f..3a111f394d 100644
--- a/boa_engine/src/builtins/json/mod.rs
+++ b/boa_engine/src/builtins/json/mod.rs
@@ -216,7 +216,7 @@ impl Json {
 
             // b. Let rootName be the empty String.
             // c. Perform ! CreateDataPropertyOrThrow(root, rootName, unfiltered).
-            root.create_data_property_or_throw("", unfiltered, context)
+            root.create_data_property_or_throw(utf16!(""), unfiltered, context)
                 .expect("CreateDataPropertyOrThrow should never throw here");
 
             // d. Return ? InternalizeJSONProperty(root, rootName, reviver).
@@ -448,7 +448,7 @@ impl Json {
 
         // 10. Perform ! CreateDataPropertyOrThrow(wrapper, the empty String, value).
         wrapper
-            .create_data_property_or_throw("", args.get_or_undefined(0).clone(), context)
+            .create_data_property_or_throw(utf16!(""), args.get_or_undefined(0).clone(), context)
             .expect("CreateDataPropertyOrThrow should never fail here");
 
         // 11. Let state be the Record { [[ReplacerFunction]]: ReplacerFunction, [[Stack]]: stack, [[Indent]]: indent, [[Gap]]: gap, [[PropertyList]]: PropertyList }.
@@ -486,7 +486,7 @@ impl Json {
         // 2. If Type(value) is Object or BigInt, then
         if value.is_object() || value.is_bigint() {
             // a. Let toJSON be ? GetV(value, "toJSON").
-            let to_json = value.get_v("toJSON", context)?;
+            let to_json = value.get_v(utf16!("toJSON"), context)?;
 
             // b. If IsCallable(toJSON) is true, then
             if let Some(obj) = to_json.as_object() {
diff --git a/boa_engine/src/builtins/map/mod.rs b/boa_engine/src/builtins/map/mod.rs
index 12240fb83a..aefc64fb7a 100644
--- a/boa_engine/src/builtins/map/mod.rs
+++ b/boa_engine/src/builtins/map/mod.rs
@@ -16,6 +16,7 @@ use crate::{
     error::JsNativeError,
     object::{internal_methods::get_prototype_from_constructor, JsObject, ObjectData},
     property::{Attribute, PropertyNameKind},
+    string::utf16,
     symbol::JsSymbol,
     Context, JsArgs, JsResult, JsValue,
 };
@@ -62,7 +63,7 @@ impl IntrinsicObject for Map {
                 Attribute::CONFIGURABLE,
             )
             .property(
-                "entries",
+                utf16!("entries"),
                 entries_function.clone(),
                 Attribute::WRITABLE | Attribute::NON_ENUMERABLE | Attribute::CONFIGURABLE,
             )
@@ -84,7 +85,12 @@ impl IntrinsicObject for Map {
             .method(Self::keys, "keys", 0)
             .method(Self::set, "set", 2)
             .method(Self::values, "values", 0)
-            .accessor("size", Some(get_size), None, Attribute::CONFIGURABLE)
+            .accessor(
+                utf16!("size"),
+                Some(get_size),
+                None,
+                Attribute::CONFIGURABLE,
+            )
             .build();
     }
 
@@ -138,7 +144,7 @@ impl BuiltInConstructor for Map {
         };
 
         // 5. Let adder be ? Get(map, "set").
-        let adder = map.get("set", context)?;
+        let adder = map.get(utf16!("set"), context)?;
 
         // 6. Return ? AddEntriesFromIterable(map, iterable, adder).
         add_entries_from_iterable(&map, iterable, &adder, context)
diff --git a/boa_engine/src/builtins/math/mod.rs b/boa_engine/src/builtins/math/mod.rs
index d60d6456d0..d3d6672d05 100644
--- a/boa_engine/src/builtins/math/mod.rs
+++ b/boa_engine/src/builtins/math/mod.rs
@@ -13,7 +13,7 @@
 
 use crate::{
     builtins::BuiltInObject, context::intrinsics::Intrinsics, object::JsObject,
-    property::Attribute, symbol::JsSymbol, Context, JsArgs, JsResult, JsValue,
+    property::Attribute, string::utf16, symbol::JsSymbol, Context, JsArgs, JsResult, JsValue,
 };
 use boa_profiler::Profiler;
 
@@ -32,14 +32,18 @@ impl IntrinsicObject for Math {
 
         let attribute = Attribute::READONLY | Attribute::NON_ENUMERABLE | Attribute::PERMANENT;
         BuiltInBuilder::with_intrinsic::<Self>(intrinsics)
-            .static_property("E", std::f64::consts::E, attribute)
-            .static_property("LN10", std::f64::consts::LN_10, attribute)
-            .static_property("LN2", std::f64::consts::LN_2, attribute)
-            .static_property("LOG10E", std::f64::consts::LOG10_E, attribute)
-            .static_property("LOG2E", std::f64::consts::LOG2_E, attribute)
-            .static_property("PI", std::f64::consts::PI, attribute)
-            .static_property("SQRT1_2", std::f64::consts::FRAC_1_SQRT_2, attribute)
-            .static_property("SQRT2", std::f64::consts::SQRT_2, attribute)
+            .static_property(utf16!("E"), std::f64::consts::E, attribute)
+            .static_property(utf16!("LN10"), std::f64::consts::LN_10, attribute)
+            .static_property(utf16!("LN2"), std::f64::consts::LN_2, attribute)
+            .static_property(utf16!("LOG10E"), std::f64::consts::LOG10_E, attribute)
+            .static_property(utf16!("LOG2E"), std::f64::consts::LOG2_E, attribute)
+            .static_property(utf16!("PI"), std::f64::consts::PI, attribute)
+            .static_property(
+                utf16!("SQRT1_2"),
+                std::f64::consts::FRAC_1_SQRT_2,
+                attribute,
+            )
+            .static_property(utf16!("SQRT2"), std::f64::consts::SQRT_2, attribute)
             .static_method(Self::abs, "abs", 1)
             .static_method(Self::acos, "acos", 1)
             .static_method(Self::acosh, "acosh", 1)
diff --git a/boa_engine/src/builtins/mod.rs b/boa_engine/src/builtins/mod.rs
index e8248f4050..bbbc7ec303 100644
--- a/boa_engine/src/builtins/mod.rs
+++ b/boa_engine/src/builtins/mod.rs
@@ -97,6 +97,7 @@ use crate::{
         FunctionBinding, JsFunction, JsObject, JsPrototype, ObjectData, CONSTRUCTOR, PROTOTYPE,
     },
     property::{Attribute, PropertyDescriptor, PropertyKey},
+    string::utf16,
     Context, JsResult, JsString, JsValue,
 };
 
@@ -273,7 +274,7 @@ pub(crate) fn set_default_global_bindings(context: &mut Context<'_>) -> JsResult
     let global_object = context.global_object().clone();
 
     global_object.define_property_or_throw(
-        "globalThis",
+        utf16!("globalThis"),
         PropertyDescriptor::builder()
             .value(context.realm.global_this().clone())
             .writable(true)
@@ -286,13 +287,17 @@ pub(crate) fn set_default_global_bindings(context: &mut Context<'_>) -> JsResult
         .enumerable(false)
         .configurable(false);
     global_object.define_property_or_throw(
-        "Infinity",
+        utf16!("Infinity"),
         restricted.clone().value(f64::INFINITY),
         context,
     )?;
-    global_object.define_property_or_throw("NaN", restricted.clone().value(f64::NAN), context)?;
     global_object.define_property_or_throw(
-        "undefined",
+        utf16!("NaN"),
+        restricted.clone().value(f64::NAN),
+        context,
+    )?;
+    global_object.define_property_or_throw(
+        utf16!("undefined"),
         restricted.value(JsValue::undefined()),
         context,
     )?;
@@ -357,7 +362,7 @@ pub(crate) fn set_default_global_bindings(context: &mut Context<'_>) -> JsResult
         let object = Console::init(context);
         let global_object = context.global_object().clone();
         global_object.define_property_or_throw(
-            "console",
+            utf16!("console"),
             PropertyDescriptor::builder()
                 .value(object)
                 .writable(true)
@@ -475,8 +480,8 @@ impl<S: ApplyToObject + IsConstructor> ApplyToObject for Callable<S> {
         {
             let mut constructor = object.borrow_mut();
             constructor.data = ObjectData::function(function);
-            constructor.insert("length", length);
-            constructor.insert("name", name);
+            constructor.insert(utf16!("length"), length);
+            constructor.insert(utf16!("name"), name);
         }
     }
 }
diff --git a/boa_engine/src/builtins/number/mod.rs b/boa_engine/src/builtins/number/mod.rs
index edc6f7475a..d9043af931 100644
--- a/boa_engine/src/builtins/number/mod.rs
+++ b/boa_engine/src/builtins/number/mod.rs
@@ -19,6 +19,7 @@ use crate::{
     error::JsNativeError,
     object::{internal_methods::get_prototype_from_constructor, JsObject, ObjectData},
     property::Attribute,
+    string::utf16,
     value::{AbstractRelation, IntegerOrInfinity, JsValue},
     Context, JsArgs, JsResult,
 };
@@ -50,21 +51,29 @@ impl IntrinsicObject for Number {
         let attribute = Attribute::READONLY | Attribute::NON_ENUMERABLE | Attribute::PERMANENT;
 
         BuiltInBuilder::from_standard_constructor::<Self>(intrinsics)
-            .static_property("EPSILON", f64::EPSILON, attribute)
-            .static_property("MAX_SAFE_INTEGER", Self::MAX_SAFE_INTEGER, attribute)
-            .static_property("MIN_SAFE_INTEGER", Self::MIN_SAFE_INTEGER, attribute)
-            .static_property("MAX_VALUE", Self::MAX_VALUE, attribute)
-            .static_property("MIN_VALUE", Self::MIN_VALUE, attribute)
-            .static_property("NEGATIVE_INFINITY", f64::NEG_INFINITY, attribute)
-            .static_property("POSITIVE_INFINITY", f64::INFINITY, attribute)
-            .static_property("NaN", f64::NAN, attribute)
+            .static_property(utf16!("EPSILON"), f64::EPSILON, attribute)
             .static_property(
-                "parseInt",
+                utf16!("MAX_SAFE_INTEGER"),
+                Self::MAX_SAFE_INTEGER,
+                attribute,
+            )
+            .static_property(
+                utf16!("MIN_SAFE_INTEGER"),
+                Self::MIN_SAFE_INTEGER,
+                attribute,
+            )
+            .static_property(utf16!("MAX_VALUE"), Self::MAX_VALUE, attribute)
+            .static_property(utf16!("MIN_VALUE"), Self::MIN_VALUE, attribute)
+            .static_property(utf16!("NEGATIVE_INFINITY"), f64::NEG_INFINITY, attribute)
+            .static_property(utf16!("POSITIVE_INFINITY"), f64::INFINITY, attribute)
+            .static_property(utf16!("NaN"), f64::NAN, attribute)
+            .static_property(
+                utf16!("parseInt"),
                 intrinsics.objects().parse_int(),
                 Attribute::WRITABLE | Attribute::NON_ENUMERABLE | Attribute::CONFIGURABLE,
             )
             .static_property(
-                "parseFloat",
+                utf16!("parseFloat"),
                 intrinsics.objects().parse_float(),
                 Attribute::WRITABLE | Attribute::NON_ENUMERABLE | Attribute::CONFIGURABLE,
             )
diff --git a/boa_engine/src/builtins/object/mod.rs b/boa_engine/src/builtins/object/mod.rs
index 189f757086..02871e5ff4 100644
--- a/boa_engine/src/builtins/object/mod.rs
+++ b/boa_engine/src/builtins/object/mod.rs
@@ -60,7 +60,7 @@ impl IntrinsicObject for Object {
         BuiltInBuilder::from_standard_constructor::<Self>(intrinsics)
             .inherits(None)
             .accessor(
-                "__proto__",
+                utf16!("__proto__"),
                 Some(legacy_proto_getter),
                 Some(legacy_setter_proto),
                 Attribute::NON_ENUMERABLE | Attribute::CONFIGURABLE,
@@ -526,42 +526,42 @@ impl Object {
         // 4. If Desc has a [[Value]] field, then
         if let Some(value) = desc.value() {
             // a. Perform ! CreateDataPropertyOrThrow(obj, "value", Desc.[[Value]]).
-            obj.create_data_property_or_throw("value", value.clone(), context)
+            obj.create_data_property_or_throw(utf16!("value"), value.clone(), context)
                 .expect("CreateDataPropertyOrThrow cannot fail here");
         }
 
         // 5. If Desc has a [[Writable]] field, then
         if let Some(writable) = desc.writable() {
             // a. Perform ! CreateDataPropertyOrThrow(obj, "writable", Desc.[[Writable]]).
-            obj.create_data_property_or_throw("writable", writable, context)
+            obj.create_data_property_or_throw(utf16!("writable"), writable, context)
                 .expect("CreateDataPropertyOrThrow cannot fail here");
         }
 
         // 6. If Desc has a [[Get]] field, then
         if let Some(get) = desc.get() {
             // a. Perform ! CreateDataPropertyOrThrow(obj, "get", Desc.[[Get]]).
-            obj.create_data_property_or_throw("get", get.clone(), context)
+            obj.create_data_property_or_throw(utf16!("get"), get.clone(), context)
                 .expect("CreateDataPropertyOrThrow cannot fail here");
         }
 
         // 7. If Desc has a [[Set]] field, then
         if let Some(set) = desc.set() {
             // a. Perform ! CreateDataPropertyOrThrow(obj, "set", Desc.[[Set]]).
-            obj.create_data_property_or_throw("set", set.clone(), context)
+            obj.create_data_property_or_throw(utf16!("set"), set.clone(), context)
                 .expect("CreateDataPropertyOrThrow cannot fail here");
         }
 
         // 8. If Desc has an [[Enumerable]] field, then
         if let Some(enumerable) = desc.enumerable() {
             // a. Perform ! CreateDataPropertyOrThrow(obj, "enumerable", Desc.[[Enumerable]]).
-            obj.create_data_property_or_throw("enumerable", enumerable, context)
+            obj.create_data_property_or_throw(utf16!("enumerable"), enumerable, context)
                 .expect("CreateDataPropertyOrThrow cannot fail here");
         }
 
         // 9. If Desc has a [[Configurable]] field, then
         if let Some(configurable) = desc.configurable() {
             // a. Perform ! CreateDataPropertyOrThrow(obj, "configurable", Desc.[[Configurable]]).
-            obj.create_data_property_or_throw("configurable", configurable, context)
+            obj.create_data_property_or_throw(utf16!("configurable"), configurable, context)
                 .expect("CreateDataPropertyOrThrow cannot fail here");
         }
 
@@ -843,7 +843,7 @@ impl Object {
     ) -> JsResult<JsValue> {
         // 1. Let O be the this value.
         // 2. Return ? Invoke(O, "toString").
-        this.invoke("toString", &[], context)
+        this.invoke(utf16!("toString"), &[], context)
     }
 
     /// `Object.prototype.hasOwnProperty( property )`
diff --git a/boa_engine/src/builtins/promise/mod.rs b/boa_engine/src/builtins/promise/mod.rs
index 84e761647c..2feea659c6 100644
--- a/boa_engine/src/builtins/promise/mod.rs
+++ b/boa_engine/src/builtins/promise/mod.rs
@@ -15,6 +15,7 @@ use crate::{
         JsObject, ObjectData, CONSTRUCTOR,
     },
     property::{Attribute, PropertyDescriptorBuilder},
+    string::utf16,
     symbol::JsSymbol,
     value::JsValue,
     Context, JsArgs, JsError, JsResult,
@@ -622,7 +623,7 @@ impl Promise {
 
             // s. Perform ? Invoke(nextPromise, "then", « onFulfilled, resultCapability.[[Reject]] »).
             next_promise.invoke(
-                "then",
+                utf16!("then"),
                 &[on_fulfilled.into(), result_capability.reject.clone().into()],
                 context,
             )?;
@@ -826,12 +827,12 @@ impl Promise {
                         let obj = JsObject::with_object_proto(context);
 
                         // 10. Perform ! CreateDataPropertyOrThrow(obj, "status", "fulfilled").
-                        obj.create_data_property_or_throw("status", "fulfilled", context)
+                        obj.create_data_property_or_throw(utf16!("status"), "fulfilled", context)
                             .expect("cannot fail per spec");
 
                         // 11. Perform ! CreateDataPropertyOrThrow(obj, "value", x).
                         obj.create_data_property_or_throw(
-                            "value",
+                            utf16!("value"),
                             args.get_or_undefined(0).clone(),
                             context,
                         )
@@ -912,12 +913,12 @@ impl Promise {
                         let obj = JsObject::with_object_proto(context);
 
                         // 10. Perform ! CreateDataPropertyOrThrow(obj, "status", "rejected").
-                        obj.create_data_property_or_throw("status", "rejected", context)
+                        obj.create_data_property_or_throw(utf16!("status"), "rejected", context)
                             .expect("cannot fail per spec");
 
                         // 11. Perform ! CreateDataPropertyOrThrow(obj, "reason", x).
                         obj.create_data_property_or_throw(
-                            "reason",
+                            utf16!("reason"),
                             args.get_or_undefined(0).clone(),
                             context,
                         )
@@ -968,7 +969,11 @@ impl Promise {
             remaining_elements_count.set(remaining_elements_count.get() + 1);
 
             // ab. Perform ? Invoke(nextPromise, "then", « onFulfilled, onRejected »).
-            next_promise.invoke("then", &[on_fulfilled.into(), on_rejected.into()], context)?;
+            next_promise.invoke(
+                utf16!("then"),
+                &[on_fulfilled.into(), on_rejected.into()],
+                context,
+            )?;
 
             // ac. Set index to index + 1.
             index += 1;
@@ -1106,7 +1111,7 @@ impl Promise {
                         // 2. Perform ! DefinePropertyOrThrow(error, "errors", PropertyDescriptor { [[Configurable]]: true, [[Enumerable]]: false, [[Writable]]: true, [[Value]]: CreateArrayFromList(errors) }).
                         error
                             .define_property_or_throw(
-                                "errors",
+                                utf16!("errors"),
                                 PropertyDescriptorBuilder::new()
                                     .configurable(true)
                                     .enumerable(false)
@@ -1203,7 +1208,7 @@ impl Promise {
                             // b. Perform ! DefinePropertyOrThrow(error, "errors", PropertyDescriptor { [[Configurable]]: true, [[Enumerable]]: false, [[Writable]]: true, [[Value]]: CreateArrayFromList(errors) }).
                             error
                                 .define_property_or_throw(
-                                    "errors",
+                                    utf16!("errors"),
                                     PropertyDescriptorBuilder::new()
                                         .configurable(true)
                                         .enumerable(false)
@@ -1245,7 +1250,7 @@ impl Promise {
 
             // s. Perform ? Invoke(nextPromise, "then", « resultCapability.[[Resolve]], onRejected »).
             next_promise.invoke(
-                "then",
+                utf16!("then"),
                 &[result_capability.resolve.clone().into(), on_rejected.into()],
                 context,
             )?;
@@ -1334,7 +1339,7 @@ impl Promise {
                     };
 
                     // 9. Let then be Completion(Get(resolution, "then")).
-                    let then_action = match then.get("then", context) {
+                    let then_action = match then.get(utf16!("then"), context) {
                         // 10. If then is an abrupt completion, then
                         Err(e) => {
                             //   a. Perform RejectPromise(promise, then.[[Value]]).
@@ -1677,7 +1682,7 @@ impl Promise {
 
             // i. Perform ? Invoke(nextPromise, "then", « resultCapability.[[Resolve]], resultCapability.[[Reject]] »).
             next_promise.invoke(
-                "then",
+                utf16!("then"),
                 &[
                     result_capability.resolve.clone().into(),
                     result_capability.reject.clone().into(),
@@ -1778,7 +1783,7 @@ impl Promise {
         let promise = this;
         // 2. Return ? Invoke(promise, "then", « undefined, onRejected »).
         promise.invoke(
-            "then",
+            utf16!("then"),
             &[JsValue::undefined(), on_rejected.clone()],
             context,
         )
@@ -1820,7 +1825,7 @@ impl Promise {
             //    a. Let thenFinally be onFinally.
             //    b. Let catchFinally be onFinally.
             // 7. Return ? Invoke(promise, "then", « thenFinally, catchFinally »).
-            let then = promise.get("then", context)?;
+            let then = promise.get(utf16!("then"), context)?;
             return then.call(this, &[on_finally.clone(), on_finally.clone()], context);
         };
 
@@ -1872,7 +1877,7 @@ impl Promise {
                         let value_thunk = return_value.length(0).name("").build();
 
                         // v. Return ? Invoke(promise, "then", « valueThunk »).
-                        promise.invoke("then", &[value_thunk.into()], context)
+                        promise.invoke(utf16!("then"), &[value_thunk.into()], context)
                     },
                     FinallyCaptures {
                         on_finally: on_finally.clone(),
@@ -1924,7 +1929,7 @@ impl Promise {
                         let thrower = throw_reason.length(0).name("").build();
 
                         // v. Return ? Invoke(promise, "then", « thrower »).
-                        promise.invoke("then", &[thrower.into()], context)
+                        promise.invoke(utf16!("then"), &[thrower.into()], context)
                     },
                     FinallyCaptures {
                         on_finally: on_finally.clone(),
@@ -1940,7 +1945,7 @@ impl Promise {
         };
 
         // 7. Return ? Invoke(promise, "then", « thenFinally, catchFinally »).
-        let then = promise.get("then", context)?;
+        let then = promise.get(utf16!("then"), context)?;
         then.call(this, &[then_finally, catch_finally], context)
     }
 
@@ -2157,7 +2162,7 @@ impl Promise {
         context: &mut Context<'_>,
     ) -> JsResult<JsObject> {
         // 1. Let promiseResolve be ? Get(promiseConstructor, "resolve").
-        let promise_resolve = promise_constructor.get("resolve", context)?;
+        let promise_resolve = promise_constructor.get(utf16!("resolve"), context)?;
 
         // 2. If IsCallable(promiseResolve) is false, throw a TypeError exception.
         promise_resolve.as_callable().cloned().ok_or_else(|| {
diff --git a/boa_engine/src/builtins/proxy/mod.rs b/boa_engine/src/builtins/proxy/mod.rs
index c45e997b91..197dbb3a3f 100644
--- a/boa_engine/src/builtins/proxy/mod.rs
+++ b/boa_engine/src/builtins/proxy/mod.rs
@@ -18,6 +18,7 @@ use crate::{
     error::JsNativeError,
     native_function::NativeFunction,
     object::{FunctionObjectBuilder, JsFunction, JsObject, ObjectData},
+    string::utf16,
     Context, JsArgs, JsResult, JsValue,
 };
 use boa_gc::{Finalize, Trace};
@@ -187,12 +188,12 @@ impl Proxy {
 
         // 6. Perform ! CreateDataPropertyOrThrow(result, "proxy", p).
         result
-            .create_data_property_or_throw("proxy", p, context)
+            .create_data_property_or_throw(utf16!("proxy"), p, context)
             .expect("CreateDataPropertyOrThrow cannot fail here");
 
         // 7. Perform ! CreateDataPropertyOrThrow(result, "revoke", revoker).
         result
-            .create_data_property_or_throw("revoke", revoker, context)
+            .create_data_property_or_throw(utf16!("revoke"), revoker, context)
             .expect("CreateDataPropertyOrThrow cannot fail here");
 
         // 8. Return result.
diff --git a/boa_engine/src/builtins/reflect/mod.rs b/boa_engine/src/builtins/reflect/mod.rs
index 5523b55fb9..092af9a44c 100644
--- a/boa_engine/src/builtins/reflect/mod.rs
+++ b/boa_engine/src/builtins/reflect/mod.rs
@@ -167,7 +167,7 @@ impl Reflect {
             .into();
 
         target
-            .__define_own_property__(key, prop_desc.to_property_descriptor(context)?, context)
+            .__define_own_property__(&key, prop_desc.to_property_descriptor(context)?, context)
             .map(Into::into)
     }
 
diff --git a/boa_engine/src/builtins/regexp/mod.rs b/boa_engine/src/builtins/regexp/mod.rs
index 0bc44fcd07..8f70a93fcf 100644
--- a/boa_engine/src/builtins/regexp/mod.rs
+++ b/boa_engine/src/builtins/regexp/mod.rs
@@ -97,7 +97,7 @@ impl IntrinsicObject for RegExp {
                 None,
                 Attribute::CONFIGURABLE,
             )
-            .property("lastIndex", 0, Attribute::all())
+            .property(utf16!("lastIndex"), 0, Attribute::all())
             .method(Self::test, "test", 1)
             .method(Self::exec, "exec", 1)
             .method(Self::to_string, "toString", 0)
@@ -110,15 +110,30 @@ impl IntrinsicObject for RegExp {
             .method(Self::replace, (JsSymbol::replace(), "[Symbol.replace]"), 2)
             .method(Self::search, (JsSymbol::search(), "[Symbol.search]"), 1)
             .method(Self::split, (JsSymbol::split(), "[Symbol.split]"), 2)
-            .accessor("hasIndices", Some(get_has_indices), None, flag_attributes)
-            .accessor("global", Some(get_global), None, flag_attributes)
-            .accessor("ignoreCase", Some(get_ignore_case), None, flag_attributes)
-            .accessor("multiline", Some(get_multiline), None, flag_attributes)
-            .accessor("dotAll", Some(get_dot_all), None, flag_attributes)
-            .accessor("unicode", Some(get_unicode), None, flag_attributes)
-            .accessor("sticky", Some(get_sticky), None, flag_attributes)
-            .accessor("flags", Some(get_flags), None, flag_attributes)
-            .accessor("source", Some(get_source), None, flag_attributes)
+            .accessor(
+                utf16!("hasIndices"),
+                Some(get_has_indices),
+                None,
+                flag_attributes,
+            )
+            .accessor(utf16!("global"), Some(get_global), None, flag_attributes)
+            .accessor(
+                utf16!("ignoreCase"),
+                Some(get_ignore_case),
+                None,
+                flag_attributes,
+            )
+            .accessor(
+                utf16!("multiline"),
+                Some(get_multiline),
+                None,
+                flag_attributes,
+            )
+            .accessor(utf16!("dotAll"), Some(get_dot_all), None, flag_attributes)
+            .accessor(utf16!("unicode"), Some(get_unicode), None, flag_attributes)
+            .accessor(utf16!("sticky"), Some(get_sticky), None, flag_attributes)
+            .accessor(utf16!("flags"), Some(get_flags), None, flag_attributes)
+            .accessor(utf16!("source"), Some(get_source), None, flag_attributes)
             .build();
     }
 
@@ -219,7 +234,7 @@ impl RegExp {
 
         // 2. Perform ! DefinePropertyOrThrow(obj, "lastIndex", PropertyDescriptor { [[Writable]]: true, [[Enumerable]]: false, [[Configurable]]: false }).
         obj.define_property_or_throw(
-            "lastIndex",
+            utf16!("lastIndex"),
             PropertyDescriptorBuilder::new()
                 .writable(true)
                 .enumerable(false)
@@ -298,7 +313,7 @@ impl RegExp {
         obj.borrow_mut().data = ObjectData::reg_exp(Box::new(regexp));
 
         // 16. Perform ? Set(obj, "lastIndex", +0𝔽, true).
-        obj.set("lastIndex", 0, true, context)?;
+        obj.set(utf16!("lastIndex"), 0, true, context)?;
 
         // 16. Return obj.
         Ok(obj.into())
@@ -528,41 +543,41 @@ impl RegExp {
 
             // 4. Let hasIndices be ToBoolean(? Get(R, "hasIndices")).
             // 5. If hasIndices is true, append the code unit 0x0064 (LATIN SMALL LETTER D) as the last code unit of result.
-            if object.get("hasIndices", context)?.to_boolean() {
+            if object.get(utf16!("hasIndices"), context)?.to_boolean() {
                 result.push('d');
             }
 
             // 6. Let global be ! ToBoolean(? Get(R, "global")).
             // 7. If global is true, append the code unit 0x0067 (LATIN SMALL LETTER G) as the last code unit of result.
-            if object.get("global", context)?.to_boolean() {
+            if object.get(utf16!("global"), context)?.to_boolean() {
                 result.push('g');
             }
             // 8. Let ignoreCase be ! ToBoolean(? Get(R, "ignoreCase")).
             // 9. If ignoreCase is true, append the code unit 0x0069 (LATIN SMALL LETTER I) as the last code unit of result.
-            if object.get("ignoreCase", context)?.to_boolean() {
+            if object.get(utf16!("ignoreCase"), context)?.to_boolean() {
                 result.push('i');
             }
 
             // 10. Let multiline be ! ToBoolean(? Get(R, "multiline")).
             // 11. If multiline is true, append the code unit 0x006D (LATIN SMALL LETTER M) as the last code unit of result.
-            if object.get("multiline", context)?.to_boolean() {
+            if object.get(utf16!("multiline"), context)?.to_boolean() {
                 result.push('m');
             }
 
             // 12. Let dotAll be ! ToBoolean(? Get(R, "dotAll")).
             // 13. If dotAll is true, append the code unit 0x0073 (LATIN SMALL LETTER S) as the last code unit of result.
-            if object.get("dotAll", context)?.to_boolean() {
+            if object.get(utf16!("dotAll"), context)?.to_boolean() {
                 result.push('s');
             }
             // 14. Let unicode be ! ToBoolean(? Get(R, "unicode")).
             // 15. If unicode is true, append the code unit 0x0075 (LATIN SMALL LETTER U) as the last code unit of result.
-            if object.get("unicode", context)?.to_boolean() {
+            if object.get(utf16!("unicode"), context)?.to_boolean() {
                 result.push('u');
             }
 
             // 16. Let sticky be ! ToBoolean(? Get(R, "sticky")).
             // 17. If sticky is true, append the code unit 0x0079 (LATIN SMALL LETTER Y) as the last code unit of result.
-            if object.get("sticky", context)?.to_boolean() {
+            if object.get(utf16!("sticky"), context)?.to_boolean() {
                 result.push('y');
             }
 
@@ -747,7 +762,7 @@ impl RegExp {
         // 2. Assert: Type(S) is String.
 
         // 3. Let exec be ? Get(R, "exec").
-        let exec = this.get("exec", context)?;
+        let exec = this.get(utf16!("exec"), context)?;
 
         // 4. If IsCallable(exec) is true, then
         if let Some(exec) = exec.as_callable() {
@@ -805,7 +820,7 @@ impl RegExp {
         let length = input.len() as u64;
 
         // 4. Let lastIndex be ℝ(? ToLength(? Get(R, "lastIndex"))).
-        let mut last_index = this.get("lastIndex", context)?.to_length(context)?;
+        let mut last_index = this.get(utf16!("lastIndex"), context)?.to_length(context)?;
 
         // 5. Let flags be R.[[OriginalFlags]].
         let flags = &rx.original_flags;
@@ -835,7 +850,7 @@ impl RegExp {
                 // i. If global is true or sticky is true, then
                 if global || sticky {
                     // 1. Perform ? Set(R, "lastIndex", +0𝔽, true).
-                    this.set("lastIndex", 0, true, context)?;
+                    this.set(utf16!("lastIndex"), 0, true, context)?;
                 }
 
                 // ii. Return null.
@@ -863,7 +878,7 @@ impl RegExp {
                     // i. If sticky is true, then
                     if sticky {
                         // 1. Perform ? Set(R, "lastIndex", +0𝔽, true).
-                        this.set("lastIndex", 0, true, context)?;
+                        this.set(utf16!("lastIndex"), 0, true, context)?;
 
                         // 2. Return null.
                         return Ok(None);
@@ -880,7 +895,7 @@ impl RegExp {
                         // i. If sticky is true, then
                         if sticky {
                             // 1. Perform ? Set(R, "lastIndex", +0𝔽, true).
-                            this.set("lastIndex", 0, true, context)?;
+                            this.set(utf16!("lastIndex"), 0, true, context)?;
 
                             // 2. Return null.
                             return Ok(None);
@@ -916,7 +931,7 @@ impl RegExp {
         if global || sticky {
             // a. Perform ? Set(R, "lastIndex", 𝔽(e), true).
             this.set(
-                "lastIndex",
+                utf16!("lastIndex"),
                 lossy_input[..e].encode_utf16().count(),
                 true,
                 context,
@@ -933,11 +948,11 @@ impl RegExp {
         let a = Array::array_create(n + 1, None, context)?;
 
         // 20. Perform ! CreateDataPropertyOrThrow(A, "index", 𝔽(lastIndex)).
-        a.create_data_property_or_throw("index", match_value.start(), context)
+        a.create_data_property_or_throw(utf16!("index"), match_value.start(), context)
             .expect("this CreateDataPropertyOrThrow call must not fail");
 
         // 21. Perform ! CreateDataPropertyOrThrow(A, "input", S).
-        a.create_data_property_or_throw("input", input.clone(), context)
+        a.create_data_property_or_throw(utf16!("input"), input.clone(), context)
             .expect("this CreateDataPropertyOrThrow call must not fail");
 
         // 22. Let matchedSubstr be the substring of S from lastIndex to e.
@@ -975,7 +990,7 @@ impl RegExp {
         };
 
         // 26. Perform ! CreateDataPropertyOrThrow(A, "groups", groups).
-        a.create_data_property_or_throw("groups", groups, context)
+        a.create_data_property_or_throw(utf16!("groups"), groups, context)
             .expect("this CreateDataPropertyOrThrow call must not fail");
 
         // 27. For each integer i such that i ≥ 1 and i ≤ n, in ascending order, do
@@ -1026,7 +1041,7 @@ impl RegExp {
         let arg_str = args.get_or_undefined(0).to_string(context)?;
 
         // 4. Let global be ! ToBoolean(? Get(rx, "global")).
-        let global = rx.get("global", context)?.to_boolean();
+        let global = rx.get(utf16!("global"), context)?.to_boolean();
 
         // 5. If global is false, then
         #[allow(clippy::if_not_else)]
@@ -1039,10 +1054,10 @@ impl RegExp {
             // a. Assert: global is true.
 
             // b. Let fullUnicode be ! ToBoolean(? Get(rx, "unicode")).
-            let unicode = rx.get("unicode", context)?.to_boolean();
+            let unicode = rx.get(utf16!("unicode"), context)?.to_boolean();
 
             // c. Perform ? Set(rx, "lastIndex", +0𝔽, true).
-            rx.set("lastIndex", 0, true, context)?;
+            rx.set(utf16!("lastIndex"), 0, true, context)?;
 
             // d. Let A be ! ArrayCreate(0).
             let a =
@@ -1060,7 +1075,7 @@ impl RegExp {
                 // iii. Else,
                 if let Some(result) = result {
                     // 1. Let matchStr be ? ToString(? Get(result, "0")).
-                    let match_str = result.get("0", context)?.to_string(context)?;
+                    let match_str = result.get(0, context)?.to_string(context)?;
 
                     // 2. Perform ! CreateDataPropertyOrThrow(A, ! ToString(𝔽(n)), matchStr).
                     a.create_data_property_or_throw(n, match_str.clone(), context)
@@ -1069,13 +1084,14 @@ impl RegExp {
                     // 3. If matchStr is the empty String, then
                     if match_str.is_empty() {
                         // a. Let thisIndex be ℝ(? ToLength(? Get(rx, "lastIndex"))).
-                        let this_index = rx.get("lastIndex", context)?.to_length(context)?;
+                        let this_index =
+                            rx.get(utf16!("lastIndex"), context)?.to_length(context)?;
 
                         // b. Let nextIndex be AdvanceStringIndex(S, thisIndex, fullUnicode).
                         let next_index = advance_string_index(&arg_str, this_index, unicode);
 
                         // c. Perform ? Set(rx, "lastIndex", 𝔽(nextIndex), true).
-                        rx.set("lastIndex", JsValue::new(next_index), true, context)?;
+                        rx.set(utf16!("lastIndex"), JsValue::new(next_index), true, context)?;
                     }
 
                     // 4. Set n to n + 1.
@@ -1157,16 +1173,18 @@ impl RegExp {
         let c = regexp.species_constructor(StandardConstructors::regexp, context)?;
 
         // 5. Let flags be ? ToString(? Get(R, "flags")).
-        let flags = regexp.get("flags", context)?.to_string(context)?;
+        let flags = regexp.get(utf16!("flags"), context)?.to_string(context)?;
 
         // 6. Let matcher be ? Construct(C, « R, flags »).
         let matcher = c.construct(&[this.clone(), flags.clone().into()], Some(&c), context)?;
 
         // 7. Let lastIndex be ? ToLength(? Get(R, "lastIndex")).
-        let last_index = regexp.get("lastIndex", context)?.to_length(context)?;
+        let last_index = regexp
+            .get(utf16!("lastIndex"), context)?
+            .to_length(context)?;
 
         // 8. Perform ? Set(matcher, "lastIndex", lastIndex, true).
-        matcher.set("lastIndex", last_index, true, context)?;
+        matcher.set(utf16!("lastIndex"), last_index, true, context)?;
 
         // 9. If flags contains "g", let global be true.
         // 10. Else, let global be false.
@@ -1228,16 +1246,16 @@ impl RegExp {
         };
 
         // 7. Let global be ! ToBoolean(? Get(rx, "global")).
-        let global = rx.get("global", context)?.to_boolean();
+        let global = rx.get(utf16!("global"), context)?.to_boolean();
 
         // 8. If global is true, then
         let mut unicode = false;
         if global {
             // a. Let fullUnicode be ! ToBoolean(? Get(rx, "unicode")).
-            unicode = rx.get("unicode", context)?.to_boolean();
+            unicode = rx.get(utf16!("unicode"), context)?.to_boolean();
 
             // b. Perform ? Set(rx, "lastIndex", +0𝔽, true).
-            rx.set("lastIndex", 0, true, context)?;
+            rx.set(utf16!("lastIndex"), 0, true, context)?;
         }
 
         //  9. Let results be a new empty List.
@@ -1262,18 +1280,18 @@ impl RegExp {
                 }
                 // iii. Else,
                 // 1. Let matchStr be ? ToString(? Get(result, "0")).
-                let match_str = result.get("0", context)?.to_string(context)?;
+                let match_str = result.get(0, context)?.to_string(context)?;
 
                 // 2. If matchStr is the empty String, then
                 if match_str.is_empty() {
                     // a. Let thisIndex be ℝ(? ToLength(? Get(rx, "lastIndex"))).
-                    let this_index = rx.get("lastIndex", context)?.to_length(context)?;
+                    let this_index = rx.get(utf16!("lastIndex"), context)?.to_length(context)?;
 
                     // b. Let nextIndex be AdvanceStringIndex(S, thisIndex, fullUnicode).
                     let next_index = advance_string_index(&arg_str, this_index, unicode);
 
                     // c. Perform ? Set(rx, "lastIndex", 𝔽(nextIndex), true).
-                    rx.set("lastIndex", JsValue::new(next_index), true, context)?;
+                    rx.set(utf16!("lastIndex"), JsValue::new(next_index), true, context)?;
                 }
             } else {
                 break;
@@ -1295,14 +1313,14 @@ impl RegExp {
             let n_captures = std::cmp::max(result_length - 1, 0);
 
             // c. Let matched be ? ToString(? Get(result, "0")).
-            let matched = result.get("0", context)?.to_string(context)?;
+            let matched = result.get(0, context)?.to_string(context)?;
 
             // d. Let matchLength be the number of code units in matched.
             let match_length = matched.len();
 
             // e. Let position be ? ToIntegerOrInfinity(? Get(result, "index")).
             let position = result
-                .get("index", context)?
+                .get(utf16!("index"), context)?
                 .to_integer_or_infinity(context)?;
 
             // f. Set position to the result of clamping position between 0 and lengthS.
@@ -1331,7 +1349,7 @@ impl RegExp {
             }
 
             // j. Let namedCaptures be ? Get(result, "groups").
-            let mut named_captures = result.get("groups", context)?;
+            let mut named_captures = result.get(utf16!("groups"), context)?;
 
             // k. If functionalReplace is true, then
             let replacement = match replace {
@@ -1430,31 +1448,31 @@ impl RegExp {
         let arg_str = args.get_or_undefined(0).to_string(context)?;
 
         // 4. Let previousLastIndex be ? Get(rx, "lastIndex").
-        let previous_last_index = rx.get("lastIndex", context)?;
+        let previous_last_index = rx.get(utf16!("lastIndex"), context)?;
 
         // 5. If SameValue(previousLastIndex, +0𝔽) is false, then
         if !JsValue::same_value(&previous_last_index, &JsValue::new(0)) {
             // a. Perform ? Set(rx, "lastIndex", +0𝔽, true).
-            rx.set("lastIndex", 0, true, context)?;
+            rx.set(utf16!("lastIndex"), 0, true, context)?;
         }
 
         // 6. Let result be ? RegExpExec(rx, S).
         let result = Self::abstract_exec(rx, arg_str, context)?;
 
         // 7. Let currentLastIndex be ? Get(rx, "lastIndex").
-        let current_last_index = rx.get("lastIndex", context)?;
+        let current_last_index = rx.get(utf16!("lastIndex"), context)?;
 
         // 8. If SameValue(currentLastIndex, previousLastIndex) is false, then
         if !JsValue::same_value(&current_last_index, &previous_last_index) {
             // a. Perform ? Set(rx, "lastIndex", previousLastIndex, true).
-            rx.set("lastIndex", previous_last_index, true, context)?;
+            rx.set(utf16!("lastIndex"), previous_last_index, true, context)?;
         }
 
         // 9. If result is null, return -1𝔽.
         // 10. Return ? Get(result, "index").
         result.map_or_else(
             || Ok(JsValue::new(-1)),
-            |result| result.get("index", context),
+            |result| result.get(utf16!("index"), context),
         )
     }
 
@@ -1487,7 +1505,7 @@ impl RegExp {
         let constructor = rx.species_constructor(StandardConstructors::regexp, context)?;
 
         // 5. Let flags be ? ToString(? Get(rx, "flags")).
-        let flags = rx.get("flags", context)?.to_string(context)?;
+        let flags = rx.get(utf16!("flags"), context)?.to_string(context)?;
 
         // 6. If flags contains "u", let unicodeMatching be true.
         // 7. Else, let unicodeMatching be false.
@@ -1556,7 +1574,7 @@ impl RegExp {
         // 19. Repeat, while q < size,
         while q < size {
             // a. Perform ? Set(splitter, "lastIndex", 𝔽(q), true).
-            splitter.set("lastIndex", JsValue::new(q), true, context)?;
+            splitter.set(utf16!("lastIndex"), JsValue::new(q), true, context)?;
 
             // b. Let z be ? RegExpExec(splitter, S).
             let result = Self::abstract_exec(&splitter, arg_str.clone(), context)?;
@@ -1565,7 +1583,9 @@ impl RegExp {
             // d. Else,
             if let Some(result) = result {
                 // i. Let e be ℝ(? ToLength(? Get(splitter, "lastIndex"))).
-                let mut e = splitter.get("lastIndex", context)?.to_length(context)?;
+                let mut e = splitter
+                    .get(utf16!("lastIndex"), context)?
+                    .to_length(context)?;
 
                 // ii. Set e to min(e, size).
                 e = std::cmp::min(e, size);
diff --git a/boa_engine/src/builtins/regexp/regexp_string_iterator.rs b/boa_engine/src/builtins/regexp/regexp_string_iterator.rs
index 6578c22b94..6f07c1b6bf 100644
--- a/boa_engine/src/builtins/regexp/regexp_string_iterator.rs
+++ b/boa_engine/src/builtins/regexp/regexp_string_iterator.rs
@@ -16,6 +16,7 @@ use crate::{
     error::JsNativeError,
     object::{JsObject, ObjectData},
     property::Attribute,
+    string::utf16,
     symbol::JsSymbol,
     Context, JsResult, JsString, JsValue,
 };
@@ -144,14 +145,14 @@ impl RegExpStringIterator {
             }
 
             // iv. Let matchStr be ? ToString(? Get(match, "0")).
-            let m_str = m.get("0", context)?.to_string(context)?;
+            let m_str = m.get(0, context)?.to_string(context)?;
 
             // v. If matchStr is the empty String, then
             if m_str.is_empty() {
                 // 1. Let thisIndex be ℝ(? ToLength(? Get(R, "lastIndex"))).
                 let this_index = iterator
                     .matcher
-                    .get("lastIndex", context)?
+                    .get(utf16!("lastIndex"), context)?
                     .to_length(context)?;
 
                 // 2. Let nextIndex be ! AdvanceStringIndex(S, thisIndex, fullUnicode).
@@ -161,7 +162,7 @@ impl RegExpStringIterator {
                 // 3. Perform ? Set(R, "lastIndex", 𝔽(nextIndex), true).
                 iterator
                     .matcher
-                    .set("lastIndex", next_index, true, context)?;
+                    .set(utf16!("lastIndex"), next_index, true, context)?;
             }
 
             // vi. Perform ? Yield(match).
diff --git a/boa_engine/src/builtins/set/mod.rs b/boa_engine/src/builtins/set/mod.rs
index 6ab4a9e119..2ba7aa0579 100644
--- a/boa_engine/src/builtins/set/mod.rs
+++ b/boa_engine/src/builtins/set/mod.rs
@@ -16,6 +16,7 @@ use crate::{
     error::JsNativeError,
     object::{internal_methods::get_prototype_from_constructor, JsObject, ObjectData},
     property::{Attribute, PropertyNameKind},
+    string::utf16,
     symbol::JsSymbol,
     Context, JsArgs, JsResult, JsValue,
 };
@@ -74,13 +75,18 @@ impl IntrinsicObject for Set {
             .method(Self::for_each, "forEach", 1)
             .method(Self::has, "has", 1)
             .property(
-                "keys",
+                utf16!("keys"),
                 values_function.clone(),
                 Attribute::WRITABLE | Attribute::NON_ENUMERABLE | Attribute::CONFIGURABLE,
             )
-            .accessor("size", Some(size_getter), None, Attribute::CONFIGURABLE)
+            .accessor(
+                utf16!("size"),
+                Some(size_getter),
+                None,
+                Attribute::CONFIGURABLE,
+            )
             .property(
-                "values",
+                utf16!("values"),
                 values_function.clone(),
                 Attribute::WRITABLE | Attribute::NON_ENUMERABLE | Attribute::CONFIGURABLE,
             )
@@ -132,7 +138,7 @@ impl BuiltInConstructor for Set {
         }
 
         // 5. Let adder be ? Get(set, "add").
-        let adder = set.get("add", context)?;
+        let adder = set.get(utf16!("add"), context)?;
 
         // 6. If IsCallable(adder) is false, throw a TypeError exception.
         let adder = adder.as_callable().ok_or_else(|| {
diff --git a/boa_engine/src/builtins/string/mod.rs b/boa_engine/src/builtins/string/mod.rs
index 54851b7005..bcfe708bd8 100644
--- a/boa_engine/src/builtins/string/mod.rs
+++ b/boa_engine/src/builtins/string/mod.rs
@@ -71,7 +71,7 @@ impl IntrinsicObject for String {
 
         let attribute = Attribute::READONLY | Attribute::NON_ENUMERABLE | Attribute::PERMANENT;
         BuiltInBuilder::from_standard_constructor::<Self>(intrinsics)
-            .property("length", 0, attribute)
+            .property(utf16!("length"), 0, attribute)
             .static_method(Self::raw, "raw", 1)
             .static_method(Self::from_char_code, "fromCharCode", 1)
             .static_method(Self::from_code_point, "fromCodePoint", 1)
@@ -190,7 +190,7 @@ impl String {
         // 8. Perform ! DefinePropertyOrThrow(S, "length", PropertyDescriptor { [[Value]]: 𝔽(length),
         // [[Writable]]: false, [[Enumerable]]: false, [[Configurable]]: false }).
         s.define_property_or_throw(
-            "length",
+            utf16!("length"),
             PropertyDescriptor::builder()
                 .value(len)
                 .writable(false)
@@ -300,7 +300,7 @@ impl String {
         let cooked = args.get_or_undefined(0).to_object(context)?;
 
         // 3. Let raw be ? ToObject(? Get(cooked, "raw")).
-        let raw = cooked.get("raw", context)?.to_object(context)?;
+        let raw = cooked.get(utf16!("raw"), context)?.to_object(context)?;
 
         // 4. Let literalSegments be ? LengthOfArrayLike(raw).
         let literal_segments = raw.length_of_array_like(context)?;
@@ -1040,7 +1040,7 @@ impl String {
                 // b. If isRegExp is true, then
                 if is_reg_exp_object(obj, context)? {
                     // i. Let flags be ? Get(searchValue, "flags").
-                    let flags = obj.get("flags", context)?;
+                    let flags = obj.get(utf16!("flags"), context)?;
 
                     // ii. Perform ? RequireObjectCoercible(flags).
                     flags.require_object_coercible()?;
@@ -1972,7 +1972,7 @@ impl String {
             if let Some(regexp_obj) = regexp.as_object() {
                 if is_reg_exp_object(regexp_obj, context)? {
                     // i. Let flags be ? Get(regexp, "flags").
-                    let flags = regexp_obj.get("flags", context)?;
+                    let flags = regexp_obj.get(utf16!("flags"), context)?;
 
                     // ii. Perform ? RequireObjectCoercible(flags).
                     flags.require_object_coercible()?;
diff --git a/boa_engine/src/builtins/symbol/mod.rs b/boa_engine/src/builtins/symbol/mod.rs
index 06807efc2a..b1a0bc9b86 100644
--- a/boa_engine/src/builtins/symbol/mod.rs
+++ b/boa_engine/src/builtins/symbol/mod.rs
@@ -27,6 +27,7 @@ use crate::{
     js_string,
     object::JsObject,
     property::Attribute,
+    string::utf16,
     symbol::JsSymbol,
     value::JsValue,
     Context, JsArgs, JsResult, JsString,
@@ -123,23 +124,35 @@ impl IntrinsicObject for Symbol {
         BuiltInBuilder::from_standard_constructor::<Self>(intrinsics)
             .static_method(Self::for_, "for", 1)
             .static_method(Self::key_for, "keyFor", 1)
-            .static_property("asyncIterator", symbol_async_iterator, attribute)
-            .static_property("hasInstance", symbol_has_instance, attribute)
-            .static_property("isConcatSpreadable", symbol_is_concat_spreadable, attribute)
-            .static_property("iterator", symbol_iterator, attribute)
-            .static_property("match", symbol_match, attribute)
-            .static_property("matchAll", symbol_match_all, attribute)
-            .static_property("replace", symbol_replace, attribute)
-            .static_property("search", symbol_search, attribute)
-            .static_property("species", symbol_species, attribute)
-            .static_property("split", symbol_split, attribute)
-            .static_property("toPrimitive", symbol_to_primitive.clone(), attribute)
-            .static_property("toStringTag", symbol_to_string_tag.clone(), attribute)
-            .static_property("unscopables", symbol_unscopables, attribute)
+            .static_property(utf16!("asyncIterator"), symbol_async_iterator, attribute)
+            .static_property(utf16!("hasInstance"), symbol_has_instance, attribute)
+            .static_property(
+                utf16!("isConcatSpreadable"),
+                symbol_is_concat_spreadable,
+                attribute,
+            )
+            .static_property(utf16!("iterator"), symbol_iterator, attribute)
+            .static_property(utf16!("match"), symbol_match, attribute)
+            .static_property(utf16!("matchAll"), symbol_match_all, attribute)
+            .static_property(utf16!("replace"), symbol_replace, attribute)
+            .static_property(utf16!("search"), symbol_search, attribute)
+            .static_property(utf16!("species"), symbol_species, attribute)
+            .static_property(utf16!("split"), symbol_split, attribute)
+            .static_property(
+                utf16!("toPrimitive"),
+                symbol_to_primitive.clone(),
+                attribute,
+            )
+            .static_property(
+                utf16!("toStringTag"),
+                symbol_to_string_tag.clone(),
+                attribute,
+            )
+            .static_property(utf16!("unscopables"), symbol_unscopables, attribute)
             .method(Self::to_string, "toString", 0)
             .method(Self::value_of, "valueOf", 0)
             .accessor(
-                "description",
+                utf16!("description"),
                 Some(get_description),
                 None,
                 Attribute::CONFIGURABLE | Attribute::NON_ENUMERABLE,
diff --git a/boa_engine/src/builtins/typed_array/mod.rs b/boa_engine/src/builtins/typed_array/mod.rs
index 268c86324e..32f4ba5e27 100644
--- a/boa_engine/src/builtins/typed_array/mod.rs
+++ b/boa_engine/src/builtins/typed_array/mod.rs
@@ -25,6 +25,7 @@ use crate::{
     js_string,
     object::{internal_methods::get_prototype_from_constructor, JsObject, ObjectData},
     property::{Attribute, PropertyNameKind},
+    string::utf16,
     symbol::JsSymbol,
     value::{IntegerOrInfinity, JsValue},
     Context, JsArgs, JsResult,
@@ -64,12 +65,12 @@ macro_rules! typed_array {
                         Attribute::CONFIGURABLE,
                     )
                     .property(
-                        "BYTES_PER_ELEMENT",
+                        utf16!("BYTES_PER_ELEMENT"),
                         TypedArrayKind::$variant.element_size(),
                         Attribute::READONLY | Attribute::NON_ENUMERABLE | Attribute::PERMANENT,
                     )
                     .static_property(
-                        "BYTES_PER_ELEMENT",
+                        utf16!("BYTES_PER_ELEMENT"),
                         TypedArrayKind::$variant.element_size(),
                         Attribute::READONLY | Attribute::NON_ENUMERABLE | Attribute::PERMANENT,
                     )
@@ -275,7 +276,7 @@ impl IntrinsicObject for TypedArray {
                 Attribute::CONFIGURABLE,
             )
             .property(
-                "length",
+                utf16!("length"),
                 0,
                 Attribute::WRITABLE | Attribute::NON_ENUMERABLE | Attribute::PERMANENT,
             )
@@ -285,25 +286,25 @@ impl IntrinsicObject for TypedArray {
                 Attribute::WRITABLE | Attribute::NON_ENUMERABLE | Attribute::CONFIGURABLE,
             )
             .accessor(
-                "buffer",
+                utf16!("buffer"),
                 Some(get_buffer),
                 None,
                 Attribute::CONFIGURABLE | Attribute::NON_ENUMERABLE,
             )
             .accessor(
-                "byteLength",
+                utf16!("byteLength"),
                 Some(get_byte_length),
                 None,
                 Attribute::CONFIGURABLE | Attribute::NON_ENUMERABLE,
             )
             .accessor(
-                "byteOffset",
+                utf16!("byteOffset"),
                 Some(get_byte_offset),
                 None,
                 Attribute::CONFIGURABLE | Attribute::NON_ENUMERABLE,
             )
             .accessor(
-                "length",
+                utf16!("length"),
                 Some(get_length),
                 None,
                 Attribute::CONFIGURABLE | Attribute::NON_ENUMERABLE,
diff --git a/boa_engine/src/builtins/weak_map/mod.rs b/boa_engine/src/builtins/weak_map/mod.rs
index cceacabd3b..acb4a4ea6b 100644
--- a/boa_engine/src/builtins/weak_map/mod.rs
+++ b/boa_engine/src/builtins/weak_map/mod.rs
@@ -15,6 +15,7 @@ use crate::{
     context::intrinsics::{Intrinsics, StandardConstructor, StandardConstructors},
     object::{internal_methods::get_prototype_from_constructor, JsObject, ObjectData},
     property::Attribute,
+    string::utf16,
     symbol::JsSymbol,
     Context, JsArgs, JsNativeError, JsResult, JsValue,
 };
@@ -92,7 +93,7 @@ impl BuiltInConstructor for WeakMap {
         }
 
         // 5. Let adder be ? Get(map, "set").
-        let adder = map.get("set", context)?;
+        let adder = map.get(utf16!("set"), context)?;
 
         // 6. If IsCallable(adder) is false, throw a TypeError exception.
         if !adder.is_callable() {
diff --git a/boa_engine/src/builtins/weak_set/mod.rs b/boa_engine/src/builtins/weak_set/mod.rs
index e425e60857..1c5d087313 100644
--- a/boa_engine/src/builtins/weak_set/mod.rs
+++ b/boa_engine/src/builtins/weak_set/mod.rs
@@ -12,6 +12,7 @@ use crate::{
     context::intrinsics::{Intrinsics, StandardConstructor, StandardConstructors},
     object::{internal_methods::get_prototype_from_constructor, JsObject, ObjectData},
     property::Attribute,
+    string::utf16,
     symbol::JsSymbol,
     Context, JsArgs, JsNativeError, JsResult, JsValue,
 };
@@ -88,7 +89,7 @@ impl BuiltInConstructor for WeakSet {
         }
 
         // 5. Let adder be ? Get(set, "add").
-        let adder = weak_set.get("add", context)?;
+        let adder = weak_set.get(utf16!("add"), context)?;
 
         // 6. If IsCallable(adder) is false, throw a TypeError exception.
         let adder = adder
diff --git a/boa_engine/src/error.rs b/boa_engine/src/error.rs
index 15053186e9..20de717f15 100644
--- a/boa_engine/src/error.rs
+++ b/boa_engine/src/error.rs
@@ -5,6 +5,7 @@ use crate::{
     object::JsObject,
     object::ObjectData,
     property::PropertyDescriptor,
+    string::utf16,
     Context, JsString, JsValue,
 };
 use boa_gc::{Finalize, Trace};
@@ -249,7 +250,7 @@ impl JsError {
                     ErrorKind::Syntax => JsNativeErrorKind::Syntax,
                     ErrorKind::Uri => JsNativeErrorKind::Uri,
                     ErrorKind::Aggregate => {
-                        let errors = obj.get("errors", context).map_err(|e| {
+                        let errors = obj.get(utf16!("errors"), context).map_err(|e| {
                             TryNativeError::InaccessibleProperty {
                                 property: "errors",
                                 source: e,
@@ -670,11 +671,11 @@ impl JsNativeError {
 
         let o = JsObject::from_proto_and_data(prototype, ObjectData::error(tag));
 
-        o.create_non_enumerable_data_property_or_throw("message", &**message, context);
+        o.create_non_enumerable_data_property_or_throw(utf16!("message"), &**message, context);
 
         if let Some(cause) = cause {
             o.create_non_enumerable_data_property_or_throw(
-                "cause",
+                utf16!("cause"),
                 cause.to_opaque(context),
                 context,
             );
@@ -687,7 +688,7 @@ impl JsNativeError {
                 .collect::<Vec<_>>();
             let errors = Array::create_array_from_list(errors, context);
             o.define_property_or_throw(
-                "errors",
+                utf16!("errors"),
                 PropertyDescriptor::builder()
                     .configurable(true)
                     .enumerable(false)
diff --git a/boa_engine/src/object/builtins/jsmap.rs b/boa_engine/src/object/builtins/jsmap.rs
index cf959f532b..5eb184ab97 100644
--- a/boa_engine/src/object/builtins/jsmap.rs
+++ b/boa_engine/src/object/builtins/jsmap.rs
@@ -4,6 +4,7 @@ use crate::{
     builtins::Map,
     error::JsNativeError,
     object::{JsFunction, JsMapIterator, JsObject, JsObjectType, ObjectData},
+    string::utf16,
     Context, JsResult, JsValue,
 };
 
@@ -121,7 +122,7 @@ impl JsMap {
 
         // Let adder be Get(map, "set") per spec. This action should not fail with default map.
         let adder = map
-            .get("set", context)
+            .get(utf16!("set"), context)
             .expect("creating a map with the default prototype must not fail");
 
         let _completion_record = add_entries_from_iterable(&map, iterable, &adder, context)?;
diff --git a/boa_engine/src/object/builtins/jsproxy.rs b/boa_engine/src/object/builtins/jsproxy.rs
index 950df9b26c..ba840f20fd 100644
--- a/boa_engine/src/object/builtins/jsproxy.rs
+++ b/boa_engine/src/object/builtins/jsproxy.rs
@@ -5,6 +5,7 @@ use crate::{
     builtins::Proxy,
     native_function::{NativeFunction, NativeFunctionPointer},
     object::{FunctionObjectBuilder, JsObject, JsObjectType, ObjectData},
+    string::utf16,
     Context, JsResult, JsValue,
 };
 
@@ -379,7 +380,7 @@ impl JsProxyBuilder {
                 .length(3)
                 .build();
             handler
-                .create_data_property_or_throw("apply", f, context)
+                .create_data_property_or_throw(utf16!("apply"), f, context)
                 .expect("new object should be writable");
         }
         if let Some(construct) = self.construct {
@@ -387,7 +388,7 @@ impl JsProxyBuilder {
                 .length(3)
                 .build();
             handler
-                .create_data_property_or_throw("construct", f, context)
+                .create_data_property_or_throw(utf16!("construct"), f, context)
                 .expect("new object should be writable");
         }
         if let Some(define_property) = self.define_property {
@@ -396,7 +397,7 @@ impl JsProxyBuilder {
                     .length(3)
                     .build();
             handler
-                .create_data_property_or_throw("defineProperty", f, context)
+                .create_data_property_or_throw(utf16!("defineProperty"), f, context)
                 .expect("new object should be writable");
         }
         if let Some(delete_property) = self.delete_property {
@@ -405,7 +406,7 @@ impl JsProxyBuilder {
                     .length(2)
                     .build();
             handler
-                .create_data_property_or_throw("deleteProperty", f, context)
+                .create_data_property_or_throw(utf16!("deleteProperty"), f, context)
                 .expect("new object should be writable");
         }
         if let Some(get) = self.get {
@@ -413,7 +414,7 @@ impl JsProxyBuilder {
                 .length(3)
                 .build();
             handler
-                .create_data_property_or_throw("get", f, context)
+                .create_data_property_or_throw(utf16!("get"), f, context)
                 .expect("new object should be writable");
         }
         if let Some(get_own_property_descriptor) = self.get_own_property_descriptor {
@@ -424,7 +425,7 @@ impl JsProxyBuilder {
             .length(2)
             .build();
             handler
-                .create_data_property_or_throw("getOwnPropertyDescriptor", f, context)
+                .create_data_property_or_throw(utf16!("getOwnPropertyDescriptor"), f, context)
                 .expect("new object should be writable");
         }
         if let Some(get_prototype_of) = self.get_prototype_of {
@@ -433,7 +434,7 @@ impl JsProxyBuilder {
                     .length(1)
                     .build();
             handler
-                .create_data_property_or_throw("getPrototypeOf", f, context)
+                .create_data_property_or_throw(utf16!("getPrototypeOf"), f, context)
                 .expect("new object should be writable");
         }
         if let Some(has) = self.has {
@@ -441,7 +442,7 @@ impl JsProxyBuilder {
                 .length(2)
                 .build();
             handler
-                .create_data_property_or_throw("has", f, context)
+                .create_data_property_or_throw(utf16!("has"), f, context)
                 .expect("new object should be writable");
         }
         if let Some(is_extensible) = self.is_extensible {
@@ -449,7 +450,7 @@ impl JsProxyBuilder {
                 .length(1)
                 .build();
             handler
-                .create_data_property_or_throw("isExtensible", f, context)
+                .create_data_property_or_throw(utf16!("isExtensible"), f, context)
                 .expect("new object should be writable");
         }
         if let Some(own_keys) = self.own_keys {
@@ -457,7 +458,7 @@ impl JsProxyBuilder {
                 .length(1)
                 .build();
             handler
-                .create_data_property_or_throw("ownKeys", f, context)
+                .create_data_property_or_throw(utf16!("ownKeys"), f, context)
                 .expect("new object should be writable");
         }
         if let Some(prevent_extensions) = self.prevent_extensions {
@@ -468,7 +469,7 @@ impl JsProxyBuilder {
             .length(1)
             .build();
             handler
-                .create_data_property_or_throw("preventExtensions", f, context)
+                .create_data_property_or_throw(utf16!("preventExtensions"), f, context)
                 .expect("new object should be writable");
         }
         if let Some(set) = self.set {
@@ -476,7 +477,7 @@ impl JsProxyBuilder {
                 .length(4)
                 .build();
             handler
-                .create_data_property_or_throw("set", f, context)
+                .create_data_property_or_throw(utf16!("set"), f, context)
                 .expect("new object should be writable");
         }
         if let Some(set_prototype_of) = self.set_prototype_of {
@@ -485,7 +486,7 @@ impl JsProxyBuilder {
                     .length(2)
                     .build();
             handler
-                .create_data_property_or_throw("setPrototypeOf", f, context)
+                .create_data_property_or_throw(utf16!("setPrototypeOf"), f, context)
                 .expect("new object should be writable");
         }
 
diff --git a/boa_engine/src/object/internal_methods/arguments.rs b/boa_engine/src/object/internal_methods/arguments.rs
index 55ba547379..df67fdf159 100644
--- a/boa_engine/src/object/internal_methods/arguments.rs
+++ b/boa_engine/src/object/internal_methods/arguments.rs
@@ -68,12 +68,12 @@ pub(crate) fn arguments_exotic_get_own_property(
 #[allow(clippy::needless_pass_by_value)]
 pub(crate) fn arguments_exotic_define_own_property(
     obj: &JsObject,
-    key: PropertyKey,
+    key: &PropertyKey,
     desc: PropertyDescriptor,
     context: &mut Context<'_>,
 ) -> JsResult<bool> {
     // 2. Let isMapped be HasOwnProperty(map, P).
-    let mapped = if let PropertyKey::Index(index) = key {
+    let mapped = if let &PropertyKey::Index(index) = key {
         // 1. Let map be args.[[ParameterMap]].
         obj.borrow()
             .as_mapped_arguments()
diff --git a/boa_engine/src/object/internal_methods/array.rs b/boa_engine/src/object/internal_methods/array.rs
index bbd86b1244..6e095174f5 100644
--- a/boa_engine/src/object/internal_methods/array.rs
+++ b/boa_engine/src/object/internal_methods/array.rs
@@ -27,12 +27,12 @@ pub(crate) static ARRAY_EXOTIC_INTERNAL_METHODS: InternalObjectMethods = Interna
 /// [spec]: https://tc39.es/ecma262/#sec-array-exotic-objects-defineownproperty-p-desc
 pub(crate) fn array_exotic_define_own_property(
     obj: &JsObject,
-    key: PropertyKey,
+    key: &PropertyKey,
     desc: PropertyDescriptor,
     context: &mut Context<'_>,
 ) -> JsResult<bool> {
     // 1. Assert: IsPropertyKey(P) is true.
-    match key {
+    match *key {
         // 2. If P is "length", then
         PropertyKey::String(ref s) if s == utf16!("length") => {
             // a. Return ? ArraySetLength(A, Desc).
@@ -42,8 +42,9 @@ pub(crate) fn array_exotic_define_own_property(
         // 3. Else if P is an array index, then
         PropertyKey::Index(index) if index < u32::MAX => {
             // a. Let oldLenDesc be OrdinaryGetOwnProperty(A, "length").
-            let old_len_desc = super::ordinary_get_own_property(obj, &"length".into(), context)?
-                .expect("the property descriptor must exist");
+            let old_len_desc =
+                super::ordinary_get_own_property(obj, &utf16!("length").into(), context)?
+                    .expect("the property descriptor must exist");
 
             // b. Assert: ! IsDataDescriptor(oldLenDesc) is true.
             debug_assert!(old_len_desc.is_data_descriptor());
@@ -78,7 +79,7 @@ pub(crate) fn array_exotic_define_own_property(
                     // ii. Set succeeded to OrdinaryDefineOwnProperty(A, "length", oldLenDesc).
                     let succeeded = super::ordinary_define_own_property(
                         obj,
-                        "length".into(),
+                        &utf16!("length").into(),
                         old_len_desc.into(),
                         context,
                     )?;
@@ -113,7 +114,7 @@ fn array_set_length(
     // 1. If Desc.[[Value]] is absent, then
     let Some(new_len_val) = desc.value() else {
         // a. Return OrdinaryDefineOwnProperty(A, "length", Desc).
-        return super::ordinary_define_own_property(obj, "length".into(), desc, context);
+        return super::ordinary_define_own_property(obj, &utf16!("length").into(), desc, context);
     };
 
     // 3. Let newLen be ? ToUint32(Desc.[[Value]]).
@@ -139,7 +140,7 @@ fn array_set_length(
         .maybe_configurable(desc.configurable());
 
     // 7. Let oldLenDesc be OrdinaryGetOwnProperty(A, "length").
-    let old_len_desc = super::ordinary_get_own_property(obj, &"length".into(), context)?
+    let old_len_desc = super::ordinary_get_own_property(obj, &utf16!("length").into(), context)?
         .expect("the property descriptor must exist");
 
     // 8. Assert: ! IsDataDescriptor(oldLenDesc) is true.
@@ -156,7 +157,7 @@ fn array_set_length(
         // a. Return OrdinaryDefineOwnProperty(A, "length", newLenDesc).
         return super::ordinary_define_own_property(
             obj,
-            "length".into(),
+            &utf16!("length").into(),
             new_len_desc.build(),
             context,
         );
@@ -186,7 +187,7 @@ fn array_set_length(
     // 16. If succeeded is false, return false.
     if !super::ordinary_define_own_property(
         obj,
-        "length".into(),
+        &utf16!("length").into(),
         new_len_desc.clone().build(),
         context,
     )
@@ -223,7 +224,7 @@ fn array_set_length(
             // iii. Perform ! OrdinaryDefineOwnProperty(A, "length", newLenDesc).
             super::ordinary_define_own_property(
                 obj,
-                "length".into(),
+                &utf16!("length").into(),
                 new_len_desc.build(),
                 context,
             )
@@ -240,7 +241,7 @@ fn array_set_length(
         // PropertyDescriptor { [[Writable]]: false }).
         let succeeded = super::ordinary_define_own_property(
             obj,
-            "length".into(),
+            &utf16!("length").into(),
             PropertyDescriptor::builder().writable(false).build(),
             context,
         )
diff --git a/boa_engine/src/object/internal_methods/global.rs b/boa_engine/src/object/internal_methods/global.rs
index 59956ce1a7..41be3c3d05 100644
--- a/boa_engine/src/object/internal_methods/global.rs
+++ b/boa_engine/src/object/internal_methods/global.rs
@@ -60,20 +60,20 @@ pub(crate) fn global_get_own_property(
 #[allow(clippy::needless_pass_by_value)]
 pub(crate) fn global_define_own_property(
     obj: &JsObject,
-    key: PropertyKey,
+    key: &PropertyKey,
     desc: PropertyDescriptor,
     context: &mut Context<'_>,
 ) -> JsResult<bool> {
     let _timer = Profiler::global().start_event("Object::global_define_own_property", "object");
     // 1. Let current be ? O.[[GetOwnProperty]](P).
-    let current = global_get_own_property(obj, &key, context)?;
+    let current = global_get_own_property(obj, key, context)?;
 
     // 2. Let extensible be ? IsExtensible(O).
     let extensible = obj.__is_extensible__(context)?;
 
     // 3. Return ValidateAndApplyPropertyDescriptor(O, P, extensible, Desc, current).
     Ok(validate_and_apply_property_descriptor(
-        &key, extensible, desc, current, context,
+        key, extensible, desc, current, context,
     ))
 }
 
diff --git a/boa_engine/src/object/internal_methods/integer_indexed.rs b/boa_engine/src/object/internal_methods/integer_indexed.rs
index 5417cc5a19..fce45d172e 100644
--- a/boa_engine/src/object/internal_methods/integer_indexed.rs
+++ b/boa_engine/src/object/internal_methods/integer_indexed.rs
@@ -89,14 +89,14 @@ pub(crate) fn integer_indexed_exotic_has_property(
 /// [spec]: https://tc39.es/ecma262/#sec-integer-indexed-exotic-objects-defineownproperty-p-desc
 pub(crate) fn integer_indexed_exotic_define_own_property(
     obj: &JsObject,
-    key: PropertyKey,
+    key: &PropertyKey,
     desc: PropertyDescriptor,
     context: &mut Context<'_>,
 ) -> JsResult<bool> {
     // 1. If Type(P) is String, then
     // a. Let numericIndex be ! CanonicalNumericIndexString(P).
     // b. If numericIndex is not undefined, then
-    if let PropertyKey::Index(index) = key {
+    if let &PropertyKey::Index(index) = key {
         // i. If ! IsValidIntegerIndex(O, numericIndex) is false, return false.
         // ii. If Desc has a [[Configurable]] field and if Desc.[[Configurable]] is false, return false.
         // iii. If Desc has an [[Enumerable]] field and if Desc.[[Enumerable]] is false, return false.
diff --git a/boa_engine/src/object/internal_methods/mod.rs b/boa_engine/src/object/internal_methods/mod.rs
index 5d97436779..00279675f6 100644
--- a/boa_engine/src/object/internal_methods/mod.rs
+++ b/boa_engine/src/object/internal_methods/mod.rs
@@ -114,7 +114,7 @@ impl JsObject {
     /// [spec]: https://tc39.es/ecma262/#sec-ordinary-object-internal-methods-and-internal-slots-defineownproperty-p-desc
     pub(crate) fn __define_own_property__(
         &self,
-        key: PropertyKey,
+        key: &PropertyKey,
         desc: PropertyDescriptor,
         context: &mut Context<'_>,
     ) -> JsResult<bool> {
@@ -305,7 +305,7 @@ pub(crate) struct InternalObjectMethods {
     pub(crate) __get_own_property__:
         fn(&JsObject, &PropertyKey, &mut Context<'_>) -> JsResult<Option<PropertyDescriptor>>,
     pub(crate) __define_own_property__:
-        fn(&JsObject, PropertyKey, PropertyDescriptor, &mut Context<'_>) -> JsResult<bool>,
+        fn(&JsObject, &PropertyKey, PropertyDescriptor, &mut Context<'_>) -> JsResult<bool>,
     pub(crate) __has_property__: fn(&JsObject, &PropertyKey, &mut Context<'_>) -> JsResult<bool>,
     pub(crate) __get__: fn(&JsObject, &PropertyKey, JsValue, &mut Context<'_>) -> JsResult<JsValue>,
     pub(crate) __set__:
@@ -462,13 +462,13 @@ pub(crate) fn ordinary_get_own_property(
 /// [spec]: https://tc39.es/ecma262/#sec-ordinarydefineownproperty
 pub(crate) fn ordinary_define_own_property(
     obj: &JsObject,
-    key: PropertyKey,
+    key: &PropertyKey,
     desc: PropertyDescriptor,
     context: &mut Context<'_>,
 ) -> JsResult<bool> {
     let _timer = Profiler::global().start_event("Object::ordinary_define_own_property", "object");
     // 1. Let current be ? O.[[GetOwnProperty]](P).
-    let current = obj.__get_own_property__(&key, context)?;
+    let current = obj.__get_own_property__(key, context)?;
 
     // 2. Let extensible be ? IsExtensible(O).
     let extensible = obj.__is_extensible__(context)?;
@@ -629,7 +629,7 @@ pub(crate) fn ordinary_set(
             // iii. Let valueDesc be the PropertyDescriptor { [[Value]]: V }.
             // iv. Return ? Receiver.[[DefineOwnProperty]](P, valueDesc).
             return receiver.__define_own_property__(
-                key,
+                &key,
                 PropertyDescriptor::builder().value(value).build(),
                 context,
             );
@@ -762,7 +762,7 @@ pub(crate) fn is_compatible_property_descriptor(
 ///
 /// [spec]: https://tc39.es/ecma262/#sec-validateandapplypropertydescriptor
 pub(crate) fn validate_and_apply_property_descriptor(
-    obj_and_key: Option<(&JsObject, PropertyKey)>,
+    obj_and_key: Option<(&JsObject, &PropertyKey)>,
     extensible: bool,
     desc: PropertyDescriptor,
     current: Option<PropertyDescriptor>,
@@ -782,7 +782,7 @@ pub(crate) fn validate_and_apply_property_descriptor(
 
         if let Some((obj, key)) = obj_and_key {
             obj.borrow_mut().properties.insert(
-                &key,
+                key,
                 // c. If IsGenericDescriptor(Desc) is true or IsDataDescriptor(Desc) is true, then
                 if desc.is_generic_descriptor() || desc.is_data_descriptor() {
                     // i. If O is not undefined, create an own data property named P of
@@ -899,7 +899,7 @@ pub(crate) fn validate_and_apply_property_descriptor(
         // a. For each field of Desc that is present, set the corresponding attribute of the
         // property named P of object O to the value of the field.
         current.fill_with(&desc);
-        obj.borrow_mut().properties.insert(&key, current);
+        obj.borrow_mut().properties.insert(key, current);
     }
 
     // 10. Return true.
diff --git a/boa_engine/src/object/internal_methods/proxy.rs b/boa_engine/src/object/internal_methods/proxy.rs
index 70722c5d53..6874d8d5d9 100644
--- a/boa_engine/src/object/internal_methods/proxy.rs
+++ b/boa_engine/src/object/internal_methods/proxy.rs
@@ -3,6 +3,7 @@ use crate::{
     error::JsNativeError,
     object::{InternalObjectMethods, JsObject, JsPrototype},
     property::{PropertyDescriptor, PropertyKey},
+    string::utf16,
     value::Type,
     Context, JsResult, JsValue,
 };
@@ -65,7 +66,7 @@ pub(crate) fn proxy_exotic_get_prototype_of(
         .try_data()?;
 
     // 5. Let trap be ? GetMethod(handler, "getPrototypeOf").
-    let Some(trap) = handler.get_method("getPrototypeOf", context)? else {
+    let Some(trap) = handler.get_method(utf16!("getPrototypeOf"), context)? else {
         // 6. If trap is undefined, then
         // a. Return ? target.[[GetPrototypeOf]]().
         return target.__get_prototype_of__(context);
@@ -127,7 +128,7 @@ pub(crate) fn proxy_exotic_set_prototype_of(
         .try_data()?;
 
     // 5. Let trap be ? GetMethod(handler, "setPrototypeOf").
-    let Some(trap) = handler.get_method("setPrototypeOf", context)? else {
+    let Some(trap) = handler.get_method(utf16!("setPrototypeOf"), context)? else {
         // 6. If trap is undefined, then
         // a. Return ? target.[[SetPrototypeOf]](V).
         return target.__set_prototype_of__(val, context);
@@ -190,7 +191,7 @@ pub(crate) fn proxy_exotic_is_extensible(
         .try_data()?;
 
     // 5. Let trap be ? GetMethod(handler, "isExtensible").
-    let Some(trap) = handler.get_method("isExtensible", context)? else {
+    let Some(trap) = handler.get_method(utf16!("isExtensible"), context)? else {
         // 6. If trap is undefined, then
         // a. Return ? IsExtensible(target).
         return target.is_extensible(context);
@@ -236,7 +237,7 @@ pub(crate) fn proxy_exotic_prevent_extensions(
         .try_data()?;
 
     // 5. Let trap be ? GetMethod(handler, "preventExtensions").
-    let Some(trap) = handler.get_method("preventExtensions", context)? else {
+    let Some(trap) = handler.get_method(utf16!("preventExtensions"), context)? else {
         // 6. If trap is undefined, then
         // a. Return ? target.[[PreventExtensions]]().
         return target.__prevent_extensions__(context);
@@ -282,7 +283,7 @@ pub(crate) fn proxy_exotic_get_own_property(
         .try_data()?;
 
     // 5. Let trap be ? GetMethod(handler, "getOwnPropertyDescriptor").
-    let Some(trap) = handler.get_method("getOwnPropertyDescriptor", context)? else {
+    let Some(trap) = handler.get_method(utf16!("getOwnPropertyDescriptor"), context)? else {
         // 6. If trap is undefined, then
         // a. Return ? target.[[GetOwnProperty]](P).
         return target.__get_own_property__(key, context);
@@ -391,7 +392,7 @@ pub(crate) fn proxy_exotic_get_own_property(
 /// [spec]: https://tc39.es/ecma262/#sec-proxy-object-internal-methods-and-internal-slots-defineownproperty-p-desc
 pub(crate) fn proxy_exotic_define_own_property(
     obj: &JsObject,
-    key: PropertyKey,
+    key: &PropertyKey,
     desc: PropertyDescriptor,
     context: &mut Context<'_>,
 ) -> JsResult<bool> {
@@ -406,7 +407,7 @@ pub(crate) fn proxy_exotic_define_own_property(
         .try_data()?;
 
     // 5. Let trap be ? GetMethod(handler, "defineProperty").
-    let Some(trap) = handler.get_method("defineProperty", context)? else {
+    let Some(trap) = handler.get_method(utf16!("defineProperty"), context)? else {
         // 6. If trap is undefined, then
         // a. Return ? target.[[DefineOwnProperty]](P, Desc).
         return target.__define_own_property__(key, desc, context);
@@ -429,7 +430,7 @@ pub(crate) fn proxy_exotic_define_own_property(
     }
 
     // 10. Let targetDesc be ? target.[[GetOwnProperty]](P).
-    let target_desc = target.__get_own_property__(&key, context)?;
+    let target_desc = target.__get_own_property__(key, context)?;
 
     // 11. Let extensibleTarget be ? IsExtensible(target).
     let extensible_target = target.is_extensible(context)?;
@@ -517,7 +518,7 @@ pub(crate) fn proxy_exotic_has_property(
         .try_data()?;
 
     // 5. Let trap be ? GetMethod(handler, "has").
-    let Some(trap) = handler.get_method("has", context)? else {
+    let Some(trap) = handler.get_method(utf16!("has"), context)? else {
         // 6. If trap is undefined, then
         // a. Return ? target.[[HasProperty]](P).
         return target.has_property(key.clone(), context);
@@ -583,7 +584,7 @@ pub(crate) fn proxy_exotic_get(
         .try_data()?;
 
     // 5. Let trap be ? GetMethod(handler, "get").
-    let Some(trap) = handler.get_method("get", context)? else {
+    let Some(trap) = handler.get_method(utf16!("get"), context)? else {
         // 6. If trap is undefined, then
         // a. Return ? target.[[Get]](P, Receiver).
         return target.__get__(key, receiver, context);
@@ -652,7 +653,7 @@ pub(crate) fn proxy_exotic_set(
         .try_data()?;
 
     // 5. Let trap be ? GetMethod(handler, "set").
-    let Some(trap) = handler.get_method("set", context)? else {
+    let Some(trap) = handler.get_method(utf16!("set"), context)? else {
         // 6. If trap is undefined, then
         // a. Return ? target.[[Set]](P, V, Receiver).
         return target.__set__(key, value, receiver, context);
@@ -733,7 +734,7 @@ pub(crate) fn proxy_exotic_delete(
         .try_data()?;
 
     // 5. Let trap be ? GetMethod(handler, "deleteProperty").
-    let Some(trap) = handler.get_method("deleteProperty", context)? else {
+    let Some(trap) = handler.get_method(utf16!("deleteProperty"), context)? else {
         // 6. If trap is undefined, then
         // a. Return ? target.[[Delete]](P).
         return target.__delete__(key, context);
@@ -799,7 +800,7 @@ pub(crate) fn proxy_exotic_own_property_keys(
         .try_data()?;
 
     // 5. Let trap be ? GetMethod(handler, "ownKeys").
-    let Some(trap) = handler.get_method("ownKeys", context)? else {
+    let Some(trap) = handler.get_method(utf16!("ownKeys"), context)? else {
         // 6. If trap is undefined, then
         // a. Return ? target.[[OwnPropertyKeys]]().
         return target.__own_property_keys__(context);
@@ -935,7 +936,7 @@ fn proxy_exotic_call(
         .try_data()?;
 
     // 5. Let trap be ? GetMethod(handler, "apply").
-    let Some(trap) = handler.get_method("apply", context)? else {
+    let Some(trap) = handler.get_method(utf16!("apply"), context)? else {
         // 6. If trap is undefined, then
         // a. Return ? Call(target, thisArgument, argumentsList).
         return target.call(this, args, context);
@@ -978,7 +979,7 @@ fn proxy_exotic_construct(
     assert!(target.is_constructor());
 
     // 6. Let trap be ? GetMethod(handler, "construct").
-    let Some(trap) = handler.get_method("construct", context)? else {
+    let Some(trap) = handler.get_method(utf16!("construct"), context)? else {
         // 7. If trap is undefined, then
         // a. Return ? Construct(target, argumentsList, newTarget).
         return target.construct(args, Some(new_target), context);
diff --git a/boa_engine/src/object/internal_methods/string.rs b/boa_engine/src/object/internal_methods/string.rs
index 5e63606016..d0f316a2f6 100644
--- a/boa_engine/src/object/internal_methods/string.rs
+++ b/boa_engine/src/object/internal_methods/string.rs
@@ -52,13 +52,13 @@ pub(crate) fn string_exotic_get_own_property(
 /// [spec]: https://tc39.es/ecma262/#sec-string-exotic-objects-defineownproperty-p-desc
 pub(crate) fn string_exotic_define_own_property(
     obj: &JsObject,
-    key: PropertyKey,
+    key: &PropertyKey,
     desc: PropertyDescriptor,
     context: &mut Context<'_>,
 ) -> JsResult<bool> {
     // 1. Assert: IsPropertyKey(P) is true.
     // 2. Let stringDesc be ! StringGetOwnProperty(S, P).
-    let string_desc = string_get_own_property(obj, &key);
+    let string_desc = string_get_own_property(obj, key);
 
     // 3. If stringDesc is not undefined, then
     if let Some(string_desc) = string_desc {
diff --git a/boa_engine/src/object/jsobject.rs b/boa_engine/src/object/jsobject.rs
index ce61678f7c..f1dd101062 100644
--- a/boa_engine/src/object/jsobject.rs
+++ b/boa_engine/src/object/jsobject.rs
@@ -7,6 +7,7 @@ use crate::{
     error::JsNativeError,
     object::{ObjectData, ObjectKind},
     property::{PropertyDescriptor, PropertyKey},
+    string::utf16,
     value::PreferredType,
     Context, JsResult, JsValue,
 };
@@ -180,9 +181,9 @@ impl JsObject {
         // 4. Else,
         //    a. Let methodNames be « "valueOf", "toString" ».
         let method_names = if hint == PreferredType::String {
-            ["toString", "valueOf"]
+            [utf16!("toString"), utf16!("valueOf")]
         } else {
-            ["valueOf", "toString"]
+            [utf16!("valueOf"), utf16!("toString")]
         };
 
         // 5. For each name in methodNames in List order, do
@@ -532,41 +533,41 @@ impl JsObject {
 
         // 3. Let hasEnumerable be ? HasProperty(Obj, "enumerable").
         // 4. If hasEnumerable is true, then ...
-        if self.has_property("enumerable", context)? {
+        if self.has_property(utf16!("enumerable"), context)? {
             // a. Let enumerable be ! ToBoolean(? Get(Obj, "enumerable")).
             // b. Set desc.[[Enumerable]] to enumerable.
-            desc = desc.enumerable(self.get("enumerable", context)?.to_boolean());
+            desc = desc.enumerable(self.get(utf16!("enumerable"), context)?.to_boolean());
         }
 
         // 5. Let hasConfigurable be ? HasProperty(Obj, "configurable").
         // 6. If hasConfigurable is true, then ...
-        if self.has_property("configurable", context)? {
+        if self.has_property(utf16!("configurable"), context)? {
             // a. Let configurable be ! ToBoolean(? Get(Obj, "configurable")).
             // b. Set desc.[[Configurable]] to configurable.
-            desc = desc.configurable(self.get("configurable", context)?.to_boolean());
+            desc = desc.configurable(self.get(utf16!("configurable"), context)?.to_boolean());
         }
 
         // 7. Let hasValue be ? HasProperty(Obj, "value").
         // 8. If hasValue is true, then ...
-        if self.has_property("value", context)? {
+        if self.has_property(utf16!("value"), context)? {
             // a. Let value be ? Get(Obj, "value").
             // b. Set desc.[[Value]] to value.
-            desc = desc.value(self.get("value", context)?);
+            desc = desc.value(self.get(utf16!("value"), context)?);
         }
 
         // 9. Let hasWritable be ? HasProperty(Obj, ).
         // 10. If hasWritable is true, then ...
-        if self.has_property("writable", context)? {
+        if self.has_property(utf16!("writable"), context)? {
             // a. Let writable be ! ToBoolean(? Get(Obj, "writable")).
             // b. Set desc.[[Writable]] to writable.
-            desc = desc.writable(self.get("writable", context)?.to_boolean());
+            desc = desc.writable(self.get(utf16!("writable"), context)?.to_boolean());
         }
 
         // 11. Let hasGet be ? HasProperty(Obj, "get").
         // 12. If hasGet is true, then
-        let get = if self.has_property("get", context)? {
+        let get = if self.has_property(utf16!("get"), context)? {
             // a. Let getter be ? Get(Obj, "get").
-            let getter = self.get("get", context)?;
+            let getter = self.get(utf16!("get"), context)?;
             // b. If IsCallable(getter) is false and getter is not undefined, throw a TypeError exception.
             // todo: extract IsCallable to be callable from Value
             if !getter.is_undefined() && getter.as_object().map_or(true, |o| !o.is_callable()) {
@@ -582,9 +583,9 @@ impl JsObject {
 
         // 13. Let hasSet be ? HasProperty(Obj, "set").
         // 14. If hasSet is true, then
-        let set = if self.has_property("set", context)? {
+        let set = if self.has_property(utf16!("set"), context)? {
             // 14.a. Let setter be ? Get(Obj, "set").
-            let setter = self.get("set", context)?;
+            let setter = self.get(utf16!("set"), context)?;
             // 14.b. If IsCallable(setter) is false and setter is not undefined, throw a TypeError exception.
             // todo: extract IsCallable to be callable from Value
             if !setter.is_undefined() && setter.as_object().map_or(true, |o| !o.is_callable()) {
diff --git a/boa_engine/src/object/mod.rs b/boa_engine/src/object/mod.rs
index 7b5dce9086..3f58304537 100644
--- a/boa_engine/src/object/mod.rs
+++ b/boa_engine/src/object/mod.rs
@@ -51,6 +51,7 @@ use crate::{
     js_string,
     native_function::NativeFunction,
     property::{Attribute, PropertyDescriptor, PropertyKey},
+    string::utf16,
     Context, JsBigInt, JsString, JsSymbol, JsValue,
 };
 
@@ -81,11 +82,13 @@ pub(crate) trait JsObjectType:
 {
 }
 
-/// Static `constructor`, usually set on prototypes as a key to point to their respective constructor object.
-pub static CONSTRUCTOR: &str = "constructor";
+/// Const `constructor`, usually set on prototypes as a key to point to their respective constructor object.
+pub const CONSTRUCTOR: &[u16] = utf16!("constructor");
 
-/// Static `prototype`, usually set on constructors as a key to point to their respective prototype object.
-pub static PROTOTYPE: &str = "prototype";
+/// Const `prototype`, usually set on constructors as a key to point to their respective prototype object.
+pub const PROTOTYPE: &[u16] = utf16!("prototype");
+
+/// Common field names.
 
 /// A type alias for an object prototype.
 ///
@@ -2025,8 +2028,8 @@ impl<'ctx, 'host> FunctionObjectBuilder<'ctx, 'host> {
             .writable(false)
             .enumerable(false)
             .configurable(true);
-        function.insert_property("length", property.clone().value(self.length));
-        function.insert_property("name", property.value(self.name));
+        function.insert_property(utf16!("length"), property.clone().value(self.length));
+        function.insert_property(utf16!("name"), property.value(self.name));
 
         JsFunction::from_object_unchecked(function)
     }
@@ -2395,8 +2398,8 @@ impl<'ctx, 'host> ConstructorBuilder<'ctx, 'host> {
         {
             let mut constructor = self.object.borrow_mut();
             constructor.data = ObjectData::function(function);
-            constructor.insert("length", length);
-            constructor.insert("name", name);
+            constructor.insert(utf16!("length"), length);
+            constructor.insert(utf16!("name"), name);
 
             if let Some(proto) = self.custom_prototype.take() {
                 constructor.set_prototype(proto);
@@ -2425,7 +2428,7 @@ impl<'ctx, 'host> ConstructorBuilder<'ctx, 'host> {
         {
             let mut prototype = self.prototype.borrow_mut();
             prototype.insert(
-                "constructor",
+                CONSTRUCTOR,
                 PropertyDescriptor::builder()
                     .value(self.object.clone())
                     .writable(true)
diff --git a/boa_engine/src/object/operations.rs b/boa_engine/src/object/operations.rs
index d9ca5c9c98..a12cece877 100644
--- a/boa_engine/src/object/operations.rs
+++ b/boa_engine/src/object/operations.rs
@@ -2,8 +2,9 @@ use crate::{
     builtins::{function::ClassFieldDefinition, Array},
     context::intrinsics::{StandardConstructor, StandardConstructors},
     error::JsNativeError,
-    object::{JsObject, PrivateElement},
+    object::{JsObject, PrivateElement, PROTOTYPE},
     property::{PropertyDescriptor, PropertyDescriptorBuilder, PropertyKey, PropertyNameKind},
+    string::utf16,
     value::Type,
     Context, JsResult, JsSymbol, JsValue,
 };
@@ -133,7 +134,7 @@ impl JsObject {
             .enumerable(true)
             .configurable(true);
         // 4. Return ? O.[[DefineOwnProperty]](P, newDesc).
-        self.__define_own_property__(key.into(), new_desc.into(), context)
+        self.__define_own_property__(&key.into(), new_desc.into(), context)
     }
 
     // todo: CreateMethodProperty
@@ -226,7 +227,7 @@ impl JsObject {
         // 1. Assert: Type(O) is Object.
         // 2. Assert: IsPropertyKey(P) is true.
         // 3. Let success be ? O.[[DefineOwnProperty]](P, desc).
-        let success = self.__define_own_property__(key.clone(), desc.into(), context)?;
+        let success = self.__define_own_property__(&key, desc.into(), context)?;
         // 4. If success is false, throw a TypeError exception.
         if !success {
             return Err(JsNativeError::typ()
@@ -475,7 +476,7 @@ impl JsObject {
     pub(crate) fn length_of_array_like(&self, context: &mut Context<'_>) -> JsResult<u64> {
         // 1. Assert: Type(obj) is Object.
         // 2. Return ℝ(? ToLength(? Get(obj, "length"))).
-        self.get("length", context)?.to_length(context)
+        self.get(utf16!("length"), context)?.to_length(context)
     }
 
     /// `7.3.22 SpeciesConstructor ( O, defaultConstructor )`
@@ -1184,7 +1185,7 @@ impl JsValue {
         };
 
         // 4. Let P be ? Get(C, "prototype").
-        let prototype = function.get("prototype", context)?;
+        let prototype = function.get(PROTOTYPE, context)?;
 
         // 5. If Type(P) is not Object, throw a TypeError exception.
         let prototype = prototype.as_object().ok_or_else(|| {
diff --git a/boa_engine/src/property/mod.rs b/boa_engine/src/property/mod.rs
index 941bd0fbb6..fd639b6857 100644
--- a/boa_engine/src/property/mod.rs
+++ b/boa_engine/src/property/mod.rs
@@ -569,6 +569,17 @@ pub enum PropertyKey {
     Index(u32),
 }
 
+impl From<&[u16]> for PropertyKey {
+    #[inline]
+    fn from(string: &[u16]) -> Self {
+        debug_assert!(String::from_utf16(string)
+            .expect("should be ascii string")
+            .parse::<u32>()
+            .is_err());
+        Self::String(string.into())
+    }
+}
+
 impl From<JsString> for PropertyKey {
     #[inline]
     fn from(string: JsString) -> Self {
diff --git a/boa_engine/src/value/display.rs b/boa_engine/src/value/display.rs
index 38afff909f..639d3ddcf8 100644
--- a/boa_engine/src/value/display.rs
+++ b/boa_engine/src/value/display.rs
@@ -1,11 +1,11 @@
 use std::borrow::Cow;
 
 use crate::{
-    builtins::promise::PromiseState, js_string, object::ObjectKind, property::PropertyDescriptor,
-    JsError, JsString,
+    builtins::promise::PromiseState, object::ObjectKind, property::PropertyDescriptor,
+    string::utf16, JsError, JsString,
 };
 
-use super::{fmt, Display, HashSet, JsValue, PropertyKey};
+use super::{fmt, Display, HashSet, JsValue};
 
 /// This object is used for displaying a `Value`.
 #[derive(Debug, Clone, Copy)]
@@ -123,7 +123,7 @@ pub(crate) fn log_string_from(x: &JsValue, print_internals: bool, print_children
                     let len = v
                         .borrow()
                         .properties()
-                        .get(&PropertyKey::from(js_string!("length")))
+                        .get(&utf16!("length").into())
                         .expect("array object must have 'length' property")
                         // FIXME: handle accessor descriptors
                         .expect_value()
@@ -202,7 +202,7 @@ pub(crate) fn log_string_from(x: &JsValue, print_internals: bool, print_children
                 }
                 ObjectKind::Error(_) => {
                     let name: Cow<'static, str> = v
-                        .get_property(&"name".into())
+                        .get_property(&utf16!("name").into())
                         .as_ref()
                         .and_then(PropertyDescriptor::value)
                         .map_or_else(
@@ -217,7 +217,7 @@ pub(crate) fn log_string_from(x: &JsValue, print_internals: bool, print_children
                             },
                         );
                     let message = v
-                        .get_property(&"message".into())
+                        .get_property(&utf16!("message").into())
                         .as_ref()
                         .and_then(PropertyDescriptor::value)
                         .map(|v| {
diff --git a/boa_engine/src/value/serde_json.rs b/boa_engine/src/value/serde_json.rs
index c6d271f6a8..35b408b7d9 100644
--- a/boa_engine/src/value/serde_json.rs
+++ b/boa_engine/src/value/serde_json.rs
@@ -71,7 +71,7 @@ impl JsValue {
                         .writable(true)
                         .enumerable(true)
                         .configurable(true);
-                    js_obj.borrow_mut().insert(key.as_str(), property);
+                    js_obj.borrow_mut().insert(key.clone(), property);
                 }
 
                 Ok(js_obj.into())
@@ -171,7 +171,7 @@ mod tests {
     use boa_parser::Source;
 
     use crate::object::JsArray;
-    use crate::{Context, JsValue};
+    use crate::{string::utf16, Context, JsValue};
 
     #[test]
     fn ut_json_conversions() {
@@ -199,17 +199,26 @@ mod tests {
         let value = JsValue::from_json(&json, &mut context).unwrap();
 
         let obj = value.as_object().unwrap();
-        assert_eq!(obj.get("name", &mut context).unwrap(), "John Doe".into());
-        assert_eq!(obj.get("age", &mut context).unwrap(), 43_i32.into());
-        assert_eq!(obj.get("minor", &mut context).unwrap(), false.into());
-        assert_eq!(obj.get("adult", &mut context).unwrap(), true.into());
+        assert_eq!(
+            obj.get(utf16!("name"), &mut context).unwrap(),
+            "John Doe".into()
+        );
+        assert_eq!(obj.get(utf16!("age"), &mut context).unwrap(), 43_i32.into());
+        assert_eq!(
+            obj.get(utf16!("minor"), &mut context).unwrap(),
+            false.into()
+        );
+        assert_eq!(obj.get(utf16!("adult"), &mut context).unwrap(), true.into());
         {
-            let extra = obj.get("extra", &mut context).unwrap();
+            let extra = obj.get(utf16!("extra"), &mut context).unwrap();
             let extra = extra.as_object().unwrap();
-            assert!(extra.get("address", &mut context).unwrap().is_null());
+            assert!(extra
+                .get(utf16!("address"), &mut context)
+                .unwrap()
+                .is_null());
         }
         {
-            let phones = obj.get("phones", &mut context).unwrap();
+            let phones = obj.get(utf16!("phones"), &mut context).unwrap();
             let phones = phones.as_object().unwrap();
 
             let arr = JsArray::from_object(phones.clone()).unwrap();
diff --git a/boa_engine/src/vm/code_block.rs b/boa_engine/src/vm/code_block.rs
index 3e64d9faab..99673be7fe 100644
--- a/boa_engine/src/vm/code_block.rs
+++ b/boa_engine/src/vm/code_block.rs
@@ -12,9 +12,12 @@ use crate::{
     context::intrinsics::StandardConstructors,
     environments::{BindingLocator, CompileTimeEnvironment},
     error::JsNativeError,
-    js_string,
-    object::{internal_methods::get_prototype_from_constructor, JsObject, ObjectData, CONSTRUCTOR},
+    object::{
+        internal_methods::get_prototype_from_constructor, JsObject, ObjectData, CONSTRUCTOR,
+        PROTOTYPE,
+    },
     property::PropertyDescriptor,
+    string::utf16,
     vm::{CallFrame, Opcode},
     Context, JsResult, JsString, JsValue,
 };
@@ -612,14 +615,14 @@ pub(crate) fn create_function_object(
         .build();
 
     constructor
-        .define_property_or_throw(js_string!("length"), length_property, context)
+        .define_property_or_throw(utf16!("length"), length_property, context)
         .expect("failed to define the length property of the function");
     constructor
-        .define_property_or_throw(js_string!("name"), name_property, context)
+        .define_property_or_throw(utf16!("name"), name_property, context)
         .expect("failed to define the name property of the function");
     if !r#async && !arrow && !method {
         constructor
-            .define_property_or_throw(js_string!("prototype"), prototype_property, context)
+            .define_property_or_throw(PROTOTYPE, prototype_property, context)
             .expect("failed to define the prototype property of the function");
     }
 
@@ -705,14 +708,14 @@ pub(crate) fn create_generator_function_object(
 
     if !method {
         constructor
-            .define_property_or_throw(js_string!("prototype"), prototype_property, context)
+            .define_property_or_throw(PROTOTYPE, prototype_property, context)
             .expect("failed to define the prototype property of the generator function");
     }
     constructor
-        .define_property_or_throw(js_string!("name"), name_property, context)
+        .define_property_or_throw(utf16!("name"), name_property, context)
         .expect("failed to define the name property of the generator function");
     constructor
-        .define_property_or_throw(js_string!("length"), length_property, context)
+        .define_property_or_throw(utf16!("length"), length_property, context)
         .expect("failed to define the length property of the generator function");
 
     constructor
@@ -1117,7 +1120,7 @@ impl JsObject {
                 std::mem::swap(&mut context.vm.stack, &mut stack);
 
                 let prototype = this_function_object
-                    .get("prototype", context)
+                    .get(PROTOTYPE, context)
                     .expect("GeneratorFunction must have a prototype property")
                     .as_object()
                     .map_or_else(|| context.intrinsics().objects().generator(), Clone::clone);
@@ -1255,7 +1258,7 @@ impl JsObject {
                 std::mem::swap(&mut context.vm.stack, &mut stack);
 
                 let prototype = this_function_object
-                    .get("prototype", context)
+                    .get(PROTOTYPE, context)
                     .expect("AsyncGeneratorFunction must have a prototype property")
                     .as_object()
                     .map_or_else(
diff --git a/boa_engine/src/vm/opcode/define/class/getter.rs b/boa_engine/src/vm/opcode/define/class/getter.rs
index 6f22117988..c7ba0ee819 100644
--- a/boa_engine/src/vm/opcode/define/class/getter.rs
+++ b/boa_engine/src/vm/opcode/define/class/getter.rs
@@ -45,7 +45,7 @@ impl Operation for DefineClassStaticGetterByName {
             .and_then(PropertyDescriptor::set)
             .cloned();
         class.__define_own_property__(
-            key,
+            &key,
             PropertyDescriptor::builder()
                 .maybe_get(Some(function))
                 .maybe_set(set)
@@ -103,7 +103,7 @@ impl Operation for DefineClassGetterByName {
             .and_then(PropertyDescriptor::set)
             .cloned();
         class_proto.__define_own_property__(
-            key,
+            &key,
             PropertyDescriptor::builder()
                 .maybe_get(Some(function))
                 .maybe_set(set)
@@ -209,7 +209,7 @@ impl Operation for DefineClassGetterByValue {
             .and_then(PropertyDescriptor::set)
             .cloned();
         class_proto.__define_own_property__(
-            key,
+            &key,
             PropertyDescriptor::builder()
                 .maybe_get(Some(function))
                 .maybe_set(set)
diff --git a/boa_engine/src/vm/opcode/define/class/method.rs b/boa_engine/src/vm/opcode/define/class/method.rs
index 5061555b64..a37a216747 100644
--- a/boa_engine/src/vm/opcode/define/class/method.rs
+++ b/boa_engine/src/vm/opcode/define/class/method.rs
@@ -40,7 +40,7 @@ impl Operation for DefineClassStaticMethodByName {
             function_mut.set_class_object(class.clone());
         }
         class.__define_own_property__(
-            key,
+            &key,
             PropertyDescriptor::builder()
                 .value(function)
                 .writable(true)
@@ -93,7 +93,7 @@ impl Operation for DefineClassMethodByName {
             function_mut.set_class_object(class);
         }
         class_proto.__define_own_property__(
-            key,
+            &key,
             PropertyDescriptor::builder()
                 .value(function)
                 .writable(true)
@@ -189,7 +189,7 @@ impl Operation for DefineClassMethodByValue {
             function_mut.set_class_object(class);
         }
         class_proto.__define_own_property__(
-            key,
+            &key,
             PropertyDescriptor::builder()
                 .value(function)
                 .writable(true)
diff --git a/boa_engine/src/vm/opcode/define/class/setter.rs b/boa_engine/src/vm/opcode/define/class/setter.rs
index 3cf068d06d..eb854675b4 100644
--- a/boa_engine/src/vm/opcode/define/class/setter.rs
+++ b/boa_engine/src/vm/opcode/define/class/setter.rs
@@ -45,7 +45,7 @@ impl Operation for DefineClassStaticSetterByName {
             .and_then(PropertyDescriptor::get)
             .cloned();
         class.__define_own_property__(
-            key,
+            &key,
             PropertyDescriptor::builder()
                 .maybe_set(Some(function))
                 .maybe_get(get)
@@ -103,7 +103,7 @@ impl Operation for DefineClassSetterByName {
             .and_then(PropertyDescriptor::get)
             .cloned();
         class_proto.__define_own_property__(
-            key,
+            &key,
             PropertyDescriptor::builder()
                 .maybe_set(Some(function))
                 .maybe_get(get)
@@ -209,7 +209,7 @@ impl Operation for DefineClassSetterByValue {
             .and_then(PropertyDescriptor::get)
             .cloned();
         class_proto.__define_own_property__(
-            key,
+            &key,
             PropertyDescriptor::builder()
                 .maybe_set(Some(function))
                 .maybe_get(get)
diff --git a/boa_engine/src/vm/opcode/define/own_property.rs b/boa_engine/src/vm/opcode/define/own_property.rs
index 471ecc963c..a5b2b31cd4 100644
--- a/boa_engine/src/vm/opcode/define/own_property.rs
+++ b/boa_engine/src/vm/opcode/define/own_property.rs
@@ -30,7 +30,7 @@ impl Operation for DefineOwnPropertyByName {
             .resolve_expect(name.sym())
             .into_common::<JsString>(false);
         object.__define_own_property__(
-            name.into(),
+            &name.into(),
             PropertyDescriptor::builder()
                 .value(value)
                 .writable(true)
@@ -65,7 +65,7 @@ impl Operation for DefineOwnPropertyByValue {
         };
         let key = key.to_property_key(context)?;
         let success = object.__define_own_property__(
-            key,
+            &key,
             PropertyDescriptor::builder()
                 .value(value)
                 .writable(true)
diff --git a/boa_engine/src/vm/opcode/generator/mod.rs b/boa_engine/src/vm/opcode/generator/mod.rs
index 2d8e0636b9..c8cb892186 100644
--- a/boa_engine/src/vm/opcode/generator/mod.rs
+++ b/boa_engine/src/vm/opcode/generator/mod.rs
@@ -4,6 +4,7 @@ use crate::{
         iterable::IteratorRecord,
     },
     error::JsNativeError,
+    string::utf16,
     vm::{
         call_frame::{FinallyReturn, GeneratorResumeKind},
         opcode::Operation,
@@ -151,14 +152,14 @@ impl Operation for GeneratorNextDelegate {
                 let result = result.as_object().ok_or_else(|| {
                     JsNativeError::typ().with_message("generator next method returned non-object")
                 })?;
-                let done = result.get("done", context)?.to_boolean();
+                let done = result.get(utf16!("done"), context)?.to_boolean();
                 if done {
                     context.vm.frame_mut().pc = done_address as usize;
-                    let value = result.get("value", context)?;
+                    let value = result.get(utf16!("value"), context)?;
                     context.vm.push(value);
                     return Ok(ShouldExit::False);
                 }
-                let value = result.get("value", context)?;
+                let value = result.get(utf16!("value"), context)?;
                 context.vm.push(iterator.clone());
                 context.vm.push(next_method.clone());
                 context.vm.push(done);
@@ -166,21 +167,21 @@ impl Operation for GeneratorNextDelegate {
                 Ok(ShouldExit::Yield)
             }
             GeneratorResumeKind::Throw => {
-                let throw = iterator.get_method("throw", context)?;
+                let throw = iterator.get_method(utf16!("throw"), context)?;
                 if let Some(throw) = throw {
                     let result = throw.call(&iterator.clone().into(), &[received], context)?;
                     let result_object = result.as_object().ok_or_else(|| {
                         JsNativeError::typ()
                             .with_message("generator throw method returned non-object")
                     })?;
-                    let done = result_object.get("done", context)?.to_boolean();
+                    let done = result_object.get(utf16!("done"), context)?.to_boolean();
                     if done {
                         context.vm.frame_mut().pc = done_address as usize;
-                        let value = result_object.get("value", context)?;
+                        let value = result_object.get(utf16!("value"), context)?;
                         context.vm.push(value);
                         return Ok(ShouldExit::False);
                     }
-                    let value = result_object.get("value", context)?;
+                    let value = result_object.get(utf16!("value"), context)?;
                     context.vm.push(iterator.clone());
                     context.vm.push(next_method.clone());
                     context.vm.push(done);
@@ -196,21 +197,21 @@ impl Operation for GeneratorNextDelegate {
                     .into())
             }
             GeneratorResumeKind::Return => {
-                let r#return = iterator.get_method("return", context)?;
+                let r#return = iterator.get_method(utf16!("return"), context)?;
                 if let Some(r#return) = r#return {
                     let result = r#return.call(&iterator.clone().into(), &[received], context)?;
                     let result_object = result.as_object().ok_or_else(|| {
                         JsNativeError::typ()
                             .with_message("generator return method returned non-object")
                     })?;
-                    let done = result_object.get("done", context)?.to_boolean();
+                    let done = result_object.get(utf16!("done"), context)?.to_boolean();
                     if done {
                         context.vm.frame_mut().pc = done_address as usize;
-                        let value = result_object.get("value", context)?;
+                        let value = result_object.get(utf16!("value"), context)?;
                         context.vm.push(value);
                         return Ok(ShouldExit::True);
                     }
-                    let value = result_object.get("value", context)?;
+                    let value = result_object.get(utf16!("value"), context)?;
                     context.vm.push(iterator.clone());
                     context.vm.push(next_method.clone());
                     context.vm.push(done);
diff --git a/boa_engine/src/vm/opcode/iteration/for_in.rs b/boa_engine/src/vm/opcode/iteration/for_in.rs
index 051b530e25..f88e00eec2 100644
--- a/boa_engine/src/vm/opcode/iteration/for_in.rs
+++ b/boa_engine/src/vm/opcode/iteration/for_in.rs
@@ -1,6 +1,7 @@
 use crate::{
     builtins::{iterable::IteratorRecord, object::for_in_iterator::ForInIterator},
     error::JsNativeError,
+    js_string,
     property::PropertyDescriptor,
     vm::{opcode::Operation, ShouldExit},
     Context, JsResult, JsValue,
@@ -29,7 +30,7 @@ impl Operation for ForInLoopInitIterator {
         let object = object.to_object(context)?;
         let iterator = ForInIterator::create_for_in_iterator(JsValue::new(object), context);
         let next_method = iterator
-            .get_property("next")
+            .get_property(js_string!("next"))
             .as_ref()
             .map(PropertyDescriptor::expect_value)
             .cloned()
diff --git a/boa_engine/src/vm/opcode/push/array.rs b/boa_engine/src/vm/opcode/push/array.rs
index 322823b1ee..7d51a7729c 100644
--- a/boa_engine/src/vm/opcode/push/array.rs
+++ b/boa_engine/src/vm/opcode/push/array.rs
@@ -1,5 +1,6 @@
 use crate::{
     builtins::{iterable::IteratorRecord, Array},
+    string::utf16,
     vm::{opcode::Operation, ShouldExit},
     Context, JsResult,
 };
@@ -67,7 +68,7 @@ impl Operation for PushElisionToArray {
             .length_of_array_like(context)
             .expect("arrays should always have a 'length' property");
 
-        o.set("length", len + 1, true, context)?;
+        o.set(utf16!("length"), len + 1, true, context)?;
         context.vm.push(array);
         Ok(ShouldExit::False)
     }
diff --git a/boa_engine/src/vm/opcode/push/class/mod.rs b/boa_engine/src/vm/opcode/push/class/mod.rs
index b53cce455f..470c06496f 100644
--- a/boa_engine/src/vm/opcode/push/class/mod.rs
+++ b/boa_engine/src/vm/opcode/push/class/mod.rs
@@ -1,6 +1,7 @@
 use crate::{
     builtins::function::{ConstructorKind, Function},
     error::JsNativeError,
+    object::PROTOTYPE,
     vm::{opcode::Operation, ShouldExit},
     Context, JsResult, JsValue,
 };
@@ -26,7 +27,7 @@ impl Operation for PushClassPrototype {
         let superclass = context.vm.pop();
 
         if let Some(superclass) = superclass.as_constructor() {
-            let proto = superclass.get("prototype", context)?;
+            let proto = superclass.get(PROTOTYPE, context)?;
             if !proto.is_object() && !proto.is_null() {
                 return Err(JsNativeError::typ()
                     .with_message("superclass prototype must be an object or null")
diff --git a/boa_engine/src/vm/opcode/push/class/private.rs b/boa_engine/src/vm/opcode/push/class/private.rs
index a827cc2a7c..c8610f4680 100644
--- a/boa_engine/src/vm/opcode/push/class/private.rs
+++ b/boa_engine/src/vm/opcode/push/class/private.rs
@@ -1,6 +1,7 @@
 use crate::{
     object::PrivateElement,
     property::PropertyDescriptor,
+    string::utf16,
     vm::{opcode::Operation, ShouldExit},
     Context, JsResult,
 };
@@ -30,7 +31,7 @@ impl Operation for PushClassPrivateMethod {
             .configurable(true)
             .build();
         method_object
-            .__define_own_property__("name".into(), desc, context)
+            .__define_own_property__(&utf16!("name").into(), desc, context)
             .expect("failed to set name property on private method");
 
         let class = context.vm.pop();
diff --git a/boa_engine/src/vm/opcode/set/class_prototype.rs b/boa_engine/src/vm/opcode/set/class_prototype.rs
index 5115a9c17e..1229637361 100644
--- a/boa_engine/src/vm/opcode/set/class_prototype.rs
+++ b/boa_engine/src/vm/opcode/set/class_prototype.rs
@@ -1,5 +1,5 @@
 use crate::{
-    object::{JsObject, ObjectData, CONSTRUCTOR},
+    object::{JsObject, ObjectData, CONSTRUCTOR, PROTOTYPE},
     property::PropertyDescriptorBuilder,
     vm::{opcode::Operation, ShouldExit},
     Context, JsResult, JsValue,
@@ -39,7 +39,7 @@ impl Operation for SetClassPrototype {
             let class_object = class.as_object().expect("class must be object");
             class_object
                 .define_property_or_throw(
-                    "prototype",
+                    PROTOTYPE,
                     PropertyDescriptorBuilder::new()
                         .value(proto.clone())
                         .writable(false)
@@ -57,7 +57,7 @@ impl Operation for SetClassPrototype {
 
         proto
             .__define_own_property__(
-                CONSTRUCTOR.into(),
+                &CONSTRUCTOR.into(),
                 PropertyDescriptorBuilder::new()
                     .value(class)
                     .writable(true)
diff --git a/boa_engine/src/vm/opcode/set/private.rs b/boa_engine/src/vm/opcode/set/private.rs
index 11d98cdf42..c77b5bc033 100644
--- a/boa_engine/src/vm/opcode/set/private.rs
+++ b/boa_engine/src/vm/opcode/set/private.rs
@@ -1,6 +1,7 @@
 use crate::{
     object::PrivateElement,
     property::PropertyDescriptor,
+    string::utf16,
     vm::{opcode::Operation, ShouldExit},
     Context, JsResult,
 };
@@ -80,7 +81,7 @@ impl Operation for SetPrivateMethod {
             .configurable(true)
             .build();
         value
-            .__define_own_property__("name".into(), desc, context)
+            .__define_own_property__(&utf16!("name").into(), desc, context)
             .expect("failed to set name property on private method");
 
         let object = context.vm.pop();
diff --git a/boa_engine/src/vm/opcode/set/property.rs b/boa_engine/src/vm/opcode/set/property.rs
index 6a9000dbd5..c866368fae 100644
--- a/boa_engine/src/vm/opcode/set/property.rs
+++ b/boa_engine/src/vm/opcode/set/property.rs
@@ -108,7 +108,7 @@ impl Operation for SetPropertyGetterByName {
             .and_then(PropertyDescriptor::set)
             .cloned();
         object.__define_own_property__(
-            name,
+            &name,
             PropertyDescriptor::builder()
                 .maybe_get(Some(value))
                 .maybe_set(set)
@@ -144,7 +144,7 @@ impl Operation for SetPropertyGetterByValue {
             .and_then(PropertyDescriptor::set)
             .cloned();
         object.__define_own_property__(
-            name,
+            &name,
             PropertyDescriptor::builder()
                 .maybe_get(Some(value))
                 .maybe_set(set)
@@ -185,7 +185,7 @@ impl Operation for SetPropertySetterByName {
             .and_then(PropertyDescriptor::get)
             .cloned();
         object.__define_own_property__(
-            name,
+            &name,
             PropertyDescriptor::builder()
                 .maybe_set(Some(value))
                 .maybe_get(get)
@@ -221,7 +221,7 @@ impl Operation for SetPropertySetterByValue {
             .and_then(PropertyDescriptor::get)
             .cloned();
         object.__define_own_property__(
-            name,
+            &name,
             PropertyDescriptor::builder()
                 .maybe_set(Some(value))
                 .maybe_get(get)