Add benchmarks for Data to JSValue and vice versa

Author: kateinoigakukun

Benchmarks/Package.swift

@@ -10,7 +10,10 @@ let package = Package(
     targets: [
         .executableTarget(
             name: "Benchmarks",
-            dependencies: ["JavaScriptKit"],
+            dependencies: [
+                "JavaScriptKit",
+                .product(name: "JavaScriptFoundationCompat", package: "JavaScriptKit"),
+            ],
             exclude: ["Generated/JavaScript", "bridge-js.d.ts"],
             swiftSettings: [
                 .enableExperimentalFeature("Extern")

Benchmarks/Sources/Benchmarks.swift

@@ -1,4 +1,6 @@
 import JavaScriptKit
+import JavaScriptFoundationCompat
+import Foundation
 
 class Benchmark {
     init(_ title: String) {
@@ -75,4 +77,22 @@ class Benchmark {
             }
         }
     }
+
+    do {
+        let conversion = Benchmark("Conversion")
+        let data = Data(repeating: 0, count: 10_000)
+        conversion.testSuite("Data to JSTypedArray") {
+            for _ in 0..<1_000_000 {
+                _ = data.jsTypedArray
+            }
+        }
+
+        let uint8Array = data.jsTypedArray
+
+        conversion.testSuite("JSTypedArray to Data") {
+            for _ in 0..<1_000_000 {
+                _ = Data.construct(from: uint8Array)
+            }
+        }
+    }
 }