flutter/dev/benchmarks/microbenchmarks/lib/stocks/layout_bench.dart
Ian Hickson b5c6da105c Port our microbenchmarks to the new world (#4121)
Our microbenchmarks now run on real devices.
2016-05-23 15:04:50 -07:00

44 lines
1.5 KiB
Dart

import 'dart:io';
import 'package:flutter_test/flutter_test.dart';
import 'package:flutter/material.dart';
import 'package:flutter/rendering.dart';
import 'package:stocks/main.dart' as stocks;
import 'package:stocks/stock_data.dart' as stock_data;
const Duration kBenchmarkTime = const Duration(seconds: 15);
Future<Null> main() async {
assert(false); // don't run this in checked mode! Use --release.
stock_data.StockDataFetcher.actuallyFetchData = false;
final Stopwatch watch = new Stopwatch();
int iterations = 0;
await benchmarkWidgets((WidgetTester tester) async {
stocks.main();
await tester.pump(); // Start startup animation
await tester.pump(const Duration(seconds: 1)); // Complete startup animation
await tester.tapAt(new Point(20.0, 20.0)); // Open drawer
await tester.pump(); // Start drawer animation
await tester.pump(const Duration(seconds: 1)); // Complete drawer animation
final TestViewConfiguration big = new TestViewConfiguration(size: const Size(360.0, 640.0));
final TestViewConfiguration small = new TestViewConfiguration(size: const Size(355.0, 635.0));
final RenderView renderView = WidgetsBinding.instance.renderView;
watch.start();
while (watch.elapsed < kBenchmarkTime) {
renderView.configuration = (iterations % 2 == 0) ? big : small;
RendererBinding.instance.pipelineOwner.flushLayout();
iterations += 1;
}
watch.stop();
});
print('Stock layout: ${(watch.elapsedMicroseconds / iterations).toStringAsFixed(1)}µs per iteration');
exit(0);
}