Reduced the size of AST nodes (#1821)

This PR boxes the `Try` and `TaggedTemplate` nodes reducing the size of the `Node` structure from 88 to 56 bytes. This should improve performance in most cases, by adding another indirection with code with `try` and templates.

Cargo.lock

@@ -1495,9 +1495,9 @@ dependencies = [
 
 [[package]]
 name = "unicode-segmentation"
-version = "1.8.0"
+version = "1.9.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "8895849a949e7845e06bd6dc1aa51731a103c42707010a5b591c0038fb73385b"
+checksum = "7e8820f5d777f6224dc4be3632222971ac30164d4a258d595640799554ebfd99"
 
 [[package]]
 name = "unicode-width"

boa/src/syntax/ast/node/mod.rs

@@ -166,7 +166,7 @@ pub enum Node {
     Spread(Spread),
 
     /// A tagged template. [More information](./template/struct.TaggedTemplate.html).
-    TaggedTemplate(TaggedTemplate),
+    TaggedTemplate(Box<TaggedTemplate>),
 
     /// A template literal. [More information](./template/struct.TemplateLit.html).
     TemplateLit(TemplateLit),
@@ -175,7 +175,7 @@ pub enum Node {
     Throw(Throw),
 
     /// A `try...catch` node. [More information](./try_node/struct.Try.htl).
-    Try(Try),
+    Try(Box<Try>),
 
     /// The JavaScript `this` keyword refers to the object it belongs to.
     ///

boa/src/syntax/ast/node/template/mod.rs

@@ -117,7 +117,7 @@ impl ToInternedString for TaggedTemplate {
 
 impl From<TaggedTemplate> for Node {
     fn from(template: TaggedTemplate) -> Self {
-        Self::TaggedTemplate(template)
+        Self::TaggedTemplate(Box::new(template))
     }
 }
 

boa/src/syntax/ast/node/try_node/mod.rs

@@ -99,7 +99,7 @@ impl ToInternedString for Try {
 
 impl From<Try> for Node {
     fn from(try_catch: Try) -> Self {
-        Self::Try(try_catch)
+        Self::Try(Box::new(try_catch))
     }
 }
 

yarn.lock

@@ -74,7 +74,12 @@
     "@types/estree" "*"
     "@types/json-schema" "*"
 
-"@types/estree@*", "@types/estree@^0.0.50":
+"@types/estree@*":
+  version "0.0.51"
+  resolved "https://registry.yarnpkg.com/@types/estree/-/estree-0.0.51.tgz#cfd70924a25a3fd32b218e5e420e6897e1ac4f40"
+  integrity sha512-CuPgU6f3eT/XgKKPqKd/gLZV1Xmvf1a2R5POBOGQa6uv82xpls89HU5zKeVoyR8XzHd1RGNOlQlvUe3CFkjWNQ==
+
+"@types/estree@^0.0.50":
   version "0.0.50"
   resolved "https://registry.yarnpkg.com/@types/estree/-/estree-0.0.50.tgz#1e0caa9364d3fccd2931c3ed96fdbeaa5d4cca83"
   integrity sha512-C6N5s2ZFtuZRj54k2/zyRhNDjJwwcViAM3Nbm8zjBpbqAdZ00mr0CFxvSKeO8Y/e03WVFLpQMdHYVfUd6SB+Hw==
@@ -595,9 +600,9 @@ camel-case@^4.1.2:
     tslib "^2.0.3"
 
 caniuse-lite@^1.0.30001286:
-  version "1.0.30001307"
+  version "1.0.30001309"
-  resolved "https://registry.yarnpkg.com/caniuse-lite/-/caniuse-lite-1.0.30001307.tgz#27a67f13ebc4aa9c977e6b8256a11d5eafb30f27"
+  resolved "https://registry.yarnpkg.com/caniuse-lite/-/caniuse-lite-1.0.30001309.tgz#e0ee78b9bec0704f67304b00ff3c5c0c768a9f62"
-  integrity sha512-+MXEMczJ4FuxJAUp0jvAl6Df0NI/OfW1RWEE61eSmzS7hw6lz4IKutbhbXendwq8BljfFuHtu26VWsg4afQ7Ng==
+  integrity sha512-Pl8vfigmBXXq+/yUz1jUwULeq9xhMJznzdc/xwl4WclDAuebcTHVefpz8lE/bMI+UN7TOkSSe7B7RnZd6+dzjA==
 
 chalk@^2.4.1:
   version "2.4.2"
@@ -1795,9 +1800,9 @@ minimalistic-assert@^1.0.0:
   integrity sha512-UtJcAD4yEaGtjPezWuO9wC4nwUnVH/8/Im3yEHQP4b67cXlD/Qr9hdITCU1xDbSEXg2XKNaP8jsReV7vQd00/A==
 
 minimatch@^3.0.4:
-  version "3.0.4"
+  version "3.0.5"
-  resolved "https://registry.yarnpkg.com/minimatch/-/minimatch-3.0.4.tgz#5166e286457f03306064be5497e8dbb0c3d32083"
+  resolved "https://registry.yarnpkg.com/minimatch/-/minimatch-3.0.5.tgz#4da8f1290ee0f0f8e83d60ca69f8f134068604a3"
-  integrity sha512-yJHVQEhyqPLUTgt9B83PXu6W3rx4MvvHvSUvToogpwoGDOUQ+yDrR0HRot+yOCdCO7u4hX3pWft6kWBBcqh0UA==
+  integrity sha512-tUpxzX0VAzJHjLu0xUfFv1gwVp9ba3IOuRAVH2EGuRW8a5emA2FlACLqiT/lDVtS1W+TGNwqz3sWaNyLgDJWuw==
   dependencies:
     brace-expansion "^1.1.7"