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https://github.com/dart-lang/sdk
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4c20cedd30
Now that I'm able to open the entire SDK in VSC, I'm fixing some of the analysis issues in various files (carefully) without changing their meaning. In this case, I removed unnecessary imports from benchmarks. In regexp_benchmark I ignored one warning which likely would have changed the behavior of the code. BUG=https://github.com/dart-lang/sdk/issues/52419 Change-Id: I9a195a4e45121313bd9f065f2579a165c3fec05b Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/303901 Auto-Submit: Eric Seidel <eric@shorebird.dev> Reviewed-by: William Hesse <whesse@google.com> Commit-Queue: William Hesse <whesse@google.com>
95 lines
2.3 KiB
Dart
95 lines
2.3 KiB
Dart
// Copyright (c) 2022, the Dart project authors. Please see the AUTHORS file
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// for details. All rights reserved. Use of this source code is governed by a
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// BSD-style license that can be found in the LICENSE file.
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//
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// Measures performance of RegExp reuse between isolates.
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import 'dart:async';
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import 'dart:isolate';
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import 'package:benchmark_harness/benchmark_harness.dart';
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class SendReceiveRegExp extends AsyncBenchmarkBase {
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SendReceiveRegExp(String name, this.re) : super(name);
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@override
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Future<void> run() async {
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await helper.run(re);
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}
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@override
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Future<void> setup() async {
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helper = SendReceiveHelper();
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await helper.setup();
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}
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@override
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Future<void> teardown() async {
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await helper.finalize();
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}
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late SendReceiveHelper helper;
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RegExp re;
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}
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class SendReceiveHelper {
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SendReceiveHelper();
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Future<void> setup() async {
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final port = ReceivePort();
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inbox = StreamIterator<dynamic>(port);
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workerExitedPort = ReceivePort();
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await Isolate.spawn(isolate, port.sendPort,
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onExit: workerExitedPort.sendPort);
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await inbox.moveNext();
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outbox = inbox.current;
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}
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Future<void> finalize() async {
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outbox.send(null);
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await workerExitedPort.first;
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workerExitedPort.close();
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await inbox.cancel();
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}
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// Send regexp to worker, get one back, repeat few times.
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Future<void> run(RegExp re) async {
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for (int i = 0; i < 5; i++) {
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outbox.send(re);
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await inbox.moveNext();
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re = inbox.current;
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}
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}
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late StreamIterator<dynamic> inbox;
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late SendPort outbox;
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late ReceivePort workerExitedPort;
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}
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Future<void> isolate(SendPort sendPort) async {
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final port = ReceivePort();
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final inbox = StreamIterator<dynamic>(port);
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sendPort.send(port.sendPort);
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while (true) {
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await inbox.moveNext();
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final received = inbox.current;
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if (received == null) {
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break;
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}
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// use RegExp to ensure it is compiled
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final RegExp re = received as RegExp;
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re.firstMatch('h' * 1000);
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// send the RegExp
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sendPort.send(re);
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}
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port.close();
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}
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Future<void> main() async {
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await SendReceiveRegExp('IsolateRegExp.MatchFast', RegExp('h?h')).report();
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await SendReceiveRegExp('IsolateRegExp.MatchSlow',
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RegExp(r'(?<=\W|\b|^)(a.? b c.?) ?(\(.*\))?$'))
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.report();
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}
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