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59cacd7102
* Return null from VM.mainView if no view exists * Retry in connectToServiceProtocol if a view is not yet available * Do not explicitly call exit from the benchmarks - it will not cleanly shut down the engine
36 lines
1.0 KiB
Dart
36 lines
1.0 KiB
Dart
// Copyright 2016 The Chromium Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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import 'package:flutter/gestures.dart';
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import 'data/velocity_tracker_data.dart';
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import '../common.dart';
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const int _kNumIters = 10000;
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void main() {
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final VelocityTracker tracker = new VelocityTracker();
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final Stopwatch watch = new Stopwatch();
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print('Velocity tracker benchmark...');
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watch.start();
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for (int i = 0; i < _kNumIters; i += 1) {
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for (PointerEvent event in velocityEventData) {
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if (event is PointerDownEvent || event is PointerMoveEvent)
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tracker.addPosition(event.timeStamp, event.position);
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if (event is PointerUpEvent)
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tracker.getVelocity();
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}
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}
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watch.stop();
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BenchmarkResultPrinter printer = new BenchmarkResultPrinter();
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printer.addResult(
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description: 'Velocity tracker',
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value: watch.elapsedMicroseconds / _kNumIters,
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unit: 'µs per iteration',
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name: 'velocity_tracker_iteration',
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);
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printer.printToStdout();
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}
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