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Self-maintained QuickJS Android Bindings.


  1. Download the latest .aar archive from release page;
  2. In Android Studio: File > New > New Module > Import .JAR/.AAR Package, locate .aar, click Finish.
QuickJS quickJS = new QuickJS.Builder().build();
try (JSRuntime runtime = quickJS.createJSRuntime()) {
  try (JSContext context = runtime.createJSContext()) {
    String script1 = "" +
        "function fibonacci(n) {" +
        "  if (n == 0 || n == 1) return n;" +
        "  return fibonacci(n - 1) + fibonacci(n - 2);" +
    // Evaluate a script without return value
    context.evaluate(script1, "fibonacci.js");

    String script2 = "fibonacci(10);";
    // Evaluate a script with return value
    int result = context.evaluate(script2, "fibonacci.js", int.class);
    assertEquals(55, result);

See Usages.md for advanced usages.


git clone --recurse-submodules https://github.com/shiqimei/quickjs-android.git

Open the folder quickjs-android in Android Studio.


This is a non-serious benchmark. The purpose is to compare the performance of QuickJS and V8 on Android.

Engine v8 QuickJS (Script Mode) QuickJS (Bytecode Mode)
init 30ms 18ms 18ms
eval 29ms 282ms 48ms
total 59ms 300ms 56ms
  • Device: Huawei P30 Pro (Kirin 980), Android 10.
  • Test JavaScript File: asset:/sonic.js (189 KB).


  1. Even when operating in bytecode mode, QuickJS's evaluation time is notably higher than V8's, and this disparity intensifies as the JavaScript file size increases.
  2. QuickJS's initialization time is slightly lower than V8's, and this advantage is constant despite of file sizes.


  1. bellard/quickjs QuickJS official repository.
  2. seven332/quickjs-android QuickJS Android Wrapper.
  3. openwebf/quickjs Optimized quickjs mantained by OpenWebF team.
  4. taoweiji/quickjs-android Android Bindings for QuickJS, A fine little javascript engine.
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