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performance_test.dart
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performance_test.dart
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import 'dart:io';
import 'dart:math';
import 'package:flutter_driver/flutter_driver.dart';
import 'package:git/git.dart';
import 'package:t_stats/t_stats.dart';
import 'parse_timeline.dart';
Future<void> main(List<String> args) async {
FlutterDriver driver;
try {
driver = await FlutterDriver.connect();
var timeline = await _run(driver);
await _save(timeline);
} finally {
if (driver != null) {
await driver.close();
}
}
}
final _addTaskButtonFinder = find.byValueKey('add_task');
final _startGameFinder = find.byValueKey('start_game');
final _teamPickOkButtonFinder = find.byValueKey('team_pick_ok');
/// This is run with [FlutterDriver.runUnsynchronized].
Future _completeTask(FlutterDriver driver, String taskName) async {
await driver.tap(_addTaskButtonFinder);
var taskBlueprint = find.text(taskName);
await driver.tap(taskBlueprint);
var jack = find.byValueKey('jack');
await driver.tap(jack);
var sourcerer = find.byValueKey('sourcerer');
await driver.tap(sourcerer);
await driver.tap(_teamPickOkButtonFinder);
var shipIt = find.text('LAUNCH!');
await driver.waitFor(shipIt);
await driver.tap(find.text(taskName));
}
Future<Timeline> _run(FlutterDriver driver) async {
var health = await driver.checkHealth();
if (health.status != HealthStatus.ok) {
throw StateError('FlutterDriver health: $health');
}
// Need to run this unsynchronized as the idle (looping) animation for
// the home screen is playing.
await driver.runUnsynchronized(() async {
// Wait for the game to settle first.
await Future<void>.delayed(const Duration(seconds: 2));
await driver.tap(_startGameFinder);
// Hire the two founders.
await driver.tap(find.byValueKey('hire-jack'));
await driver.tap(find.text('HIRE'));
await driver.tap(find.byValueKey('close-character-modal'));
await driver.tap(find.byValueKey('hire-sourcerer'));
await driver.tap(find.text('HIRE'));
await driver.tap(find.byValueKey('close-character-modal'));
await driver.tap(find.text('Tasks'));
});
// Give the UI time to settle down before starting the trace.
await Future<void>.delayed(const Duration(seconds: 1));
await driver.startTracing();
await driver.runUnsynchronized(() async {
await _completeTask(driver, 'Prototype');
await _completeTask(driver, 'Basic UI');
await _completeTask(driver, 'Basic Backend');
await _completeTask(driver, 'Alpha release');
});
return driver.stopTracingAndDownloadTimeline();
}
Future<void> _save(Timeline timeline) async {
var description = Platform.environment['DESC'];
if (description == null) {
stderr.writeln('[WARNING] No description of the run through provided. '
'You can do so via the \$DESC shell variable. '
'For example, run the command like this: \n\n'
'\$> DESC="run with foo" '
'flutter drive --target=test_driver/performance.dart --profile\n');
description = '';
}
var gitSha = '';
if (await GitDir.isGitDir('.')) {
var gitDir = await GitDir.fromExisting('.');
var branch = await gitDir.getCurrentBranch();
gitSha = branch.sha.substring(0, 8);
}
var now = DateTime.now();
var id = 'performance_test-${now.toIso8601String()}';
var filename = id.replaceAll(':', '-');
var summary = TimelineSummary.summarize(timeline);
await summary.writeSummaryToFile(filename, pretty: true);
await summary.writeTimelineToFile(filename);
var rasterizerTimes =
summary.summaryJson['frame_rasterizer_times'] as List<int>;
var buildTimes = summary.summaryJson['frame_build_times'] as List<int>;
var buildTimesStat = Statistic.from(
buildTimes,
name: id,
);
var additional = parse(timeline, summary);
var frameRequestStats = Statistic.from(
additional.frameRequestDurations.map((d) => d.inMicroseconds));
IOSink stats;
try {
stats = File('test_driver/perf_stats.tsv').openWrite(mode: FileMode.append);
// Add general build time statistics.
stats.write(buildTimesStat.toTSV());
// Add description.
stats.write('\t');
stats.write(description);
// Add additional useful stats from the TimelineSummary.
stats.write('\t');
stats.write(summary.computePercentileFrameBuildTimeMillis(90));
stats.write('\t');
stats.write(summary.computePercentileFrameBuildTimeMillis(99));
stats.write('\t');
stats.write(summary.computeWorstFrameBuildTimeMillis());
stats.write('\t');
stats.write(summary.computeMissedFrameBuildBudgetCount());
stats.write('\t');
// Add things from parse_timeline.dart.
stats.write(additional.length.inMicroseconds);
stats.write('\t');
stats.write(additional.frames);
stats.write('\t');
stats.write(additional.fps);
stats.write('\t');
stats.write(frameRequestStats.mean);
stats.write('\t');
stats.write(additional.dartPercentage);
stats.write('\t');
stats.write(additional.dartPhaseEvents);
stats.write('\t');
stats.write(additional.dartPhaseDuration.inMicroseconds);
stats.write('\t');
stats.write(additional.expiredTasksEvents);
stats.write('\t');
stats.write(additional.expiredTasksDuration.inMicroseconds);
// Add timestamp.
stats.write('\t');
stats.write(now.toIso8601String());
// End line.
stats.writeln();
} finally {
await stats?.close();
}
IOSink durations;
try {
durations =
File('test_driver/durations.tsv').openWrite(mode: FileMode.append);
var length = [
buildTimes.length,
rasterizerTimes.length,
additional.frameRequestDurations.length
].fold(0, max);
for (int i = 0; i < length; i++) {
var build = i < buildTimes.length ? buildTimes[i].toString() : '';
var rasterizer =
i < rasterizerTimes.length ? rasterizerTimes[i].toString() : '';
var frameRequest = i < additional.frameRequestDurations.length
? additional.frameRequestDurations[i].inMicroseconds.toString()
: '';
var row = <String>[
id,
build,
rasterizer,
frameRequest,
gitSha,
description,
].join('\t');
durations.writeln(row);
}
} finally {
await durations?.close();
}
print(buildTimesStat);
}