// Copyright 2016 The Chromium 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; void main() { final VelocityTracker tracker = VelocityTracker(); final Stopwatch watch = Stopwatch(); print('Velocity tracker benchmark...'); watch.start(); for (int i = 0; i < _kNumIters; i += 1) { for (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(); final BenchmarkResultPrinter printer = BenchmarkResultPrinter(); printer.addResult( description: 'Velocity tracker', value: watch.elapsedMicroseconds / _kNumIters, unit: 'µs per iteration', name: 'velocity_tracker_iteration', ); printer.printToStdout(); }