blob: d77bc04f871c85d878cb80930e88232584b6dead [file] [log] [blame]
// Copyright 2014 The Flutter Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
import 'package:flutter/gestures.dart';
import '../common.dart';
import 'data/velocity_tracker_data.dart';
const int _kNumIters = 10000;
class TrackerBenchmark {
TrackerBenchmark({required this.name, required this.tracker });
final VelocityTracker tracker;
final String name;
}
void main() {
assert(false, "Don't run benchmarks in checked mode! Use 'flutter run --release'.");
final BenchmarkResultPrinter printer = BenchmarkResultPrinter();
final List<TrackerBenchmark> benchmarks = <TrackerBenchmark>[
TrackerBenchmark(name: 'velocity_tracker_iteration', tracker: VelocityTracker.withKind(PointerDeviceKind.touch)),
TrackerBenchmark(name: 'velocity_tracker_iteration_ios_fling', tracker: IOSScrollViewFlingVelocityTracker(PointerDeviceKind.touch)),
];
final Stopwatch watch = Stopwatch();
for (final TrackerBenchmark benchmark in benchmarks) {
print('${benchmark.name} benchmark...');
final VelocityTracker tracker = benchmark.tracker;
watch.reset();
watch.start();
for (int i = 0; i < _kNumIters; i += 1) {
for (final PointerEvent event in velocityEventData) {
if (event is PointerDownEvent || event is PointerMoveEvent)
tracker.addPosition(event.timeStamp, event.position);
if (event is PointerUpEvent)
tracker.getVelocity();
}
}
watch.stop();
printer.addResult(
description: 'Velocity tracker: ${tracker.runtimeType}',
value: watch.elapsedMicroseconds / _kNumIters,
unit: 'µs per iteration',
name: benchmark.name,
);
}
printer.printToStdout();
}