main.dart

Future<void> _sort() async {
  try {
    double mean = 0;
    for (var i = 0; i < 1000; i++) {
      final stopwatch = Stopwatch()..start();

      await platform.invokeMethod('sort', list10);

      stopwatch.stop();
      // Don't worry, I converted it to milliseconds afterwards
      mean += stopwatch.elapsed.inMicroseconds;
      stopwatch.reset();
    }
    print(mean / 1000);
  } on PlatformException catch (e) {
    print("error: '${e.message}'.");
  }
}