Benchmarks. Calculate median.

Pros: it is very stable between runs (+-1%)
Cons: we don't compare extreme values

benchmarks/ios/jvm-vs-kotlin-native/build.gradle.kts

@@ -5,7 +5,7 @@ plugins {
     id("org.jetbrains.compose")
 }
 
-version = "1.0-SNAPSHOT"
+version = "1.0"
 
 repositories {
     mavenLocal()

benchmarks/ios/jvm-vs-kotlin-native/src/commonMain/kotlin/Benchmarks.kt

@@ -8,7 +8,7 @@ fun runBenchmark(name: String, frameCount: Int, content: @Composable () -> Unit)
 }
 
 fun runBenchmarks() {
-    runBenchmark("AnimatedVisibility", 1000000) { AnimatedVisibility() }
-    runBenchmark("LazyGrid",2000) { LazyGrid() }
-    runBenchmark("VisualEffects",1000) { NYContent() }
+    runBenchmark("AnimatedVisibility", 2000) { AnimatedVisibility() }
+    runBenchmark("LazyGrid",40) { LazyGrid() }
+    runBenchmark("VisualEffects",20) { NYContent() }
 }

benchmarks/ios/jvm-vs-kotlin-native/src/commonMain/kotlin/MeasureComposable.kt

@@ -2,7 +2,9 @@ import androidx.compose.runtime.Composable
 import androidx.compose.ui.ComposeScene
 import androidx.compose.ui.unit.Constraints
 import kotlin.time.Duration
+import kotlin.time.DurationUnit
 import kotlin.time.ExperimentalTime
+import kotlin.time.toDuration
 
 const val width = 640
 const val height = 480
@@ -12,22 +14,29 @@ const val nanosPerFrame = (0.16 * nanosPerSecond).toLong()
 
 @OptIn(ExperimentalTime::class)
 fun measureComposable(
-    frameCount: Int = 1000,
+    frameCount: Int = 100,
     content: @Composable () -> Unit
 ): Duration {
+
     val scene = ComposeScene()
-    try {
+    val times = try {
         scene.setContent(content)
         scene.constraints = Constraints.fixed(width, height)
         val surface = org.jetbrains.skia.Surface.makeNull(width, height)
-        return kotlin.time.measureTime {
-            var nanoTime = 0L
-            repeat(frameCount) {
-                scene.render(surface.canvas, nanoTime)
-                nanoTime += nanosPerFrame
-            }
+
+        (1..200).map {
+            kotlin.time.measureTime {
+                var nanoTime = 0L
+                repeat(frameCount) {
+                    scene.render(surface.canvas, nanoTime)
+                    nanoTime += nanosPerFrame
+                }
+            }.inWholeMilliseconds
         }
     } finally {
         scene.close()
     }
+    return times.median().toDuration(DurationUnit.MILLISECONDS)
 }
+
+private fun List<Long>.median() = sorted()[size/ 2]

benchmarks/ios/jvm-vs-kotlin-native/src/commonMain/kotlin/benchmarks/animation/AnimatedVisibility.kt

@@ -20,18 +20,20 @@ import org.jetbrains.compose.resources.painterResource
 @OptIn(ExperimentalResourceApi::class)
 @Composable
 fun AnimatedVisibility() {
-    MaterialTheme {
-        var showImage by remember { mutableStateOf(false) }
-        LaunchedEffect(showImage) {
-            delay(200)
-            showImage = !showImage
-        }
-        Column(Modifier.fillMaxWidth(), horizontalAlignment = Alignment.CenterHorizontally) {
-            AnimatedVisibility(showImage) {
-                Image(
-                    painterResource("compose-multiplatform.xml"),
-                    null
-                )
+    repeat(100) {
+        MaterialTheme {
+            var showImage by remember { mutableStateOf(false) }
+            LaunchedEffect(showImage) {
+                delay(1000)
+                showImage = !showImage
+            }
+            Column(Modifier.fillMaxWidth(), horizontalAlignment = Alignment.CenterHorizontally) {
+                AnimatedVisibility(showImage) {
+                    Image(
+                        painterResource("compose-multiplatform.xml"),
+                        null
+                    )
+                }
             }
         }
     }

benchmarks/ios/jvm-vs-kotlin-native/src/desktopMain/kotlin/main.desktop.kt

@@ -5,5 +5,6 @@
 
 import kotlinx.coroutines.Dispatchers
 import kotlinx.coroutines.runBlocking
+import org.jetbrains.skiko.MainUIDispatcher
 
-fun main() = runBlocking(Dispatchers.Main) { runBenchmarks() }
+fun main() = runBlocking(MainUIDispatcher) { runBenchmarks() }