Eric Seidel
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>
44 lines
1.2 KiB
Dart
44 lines
1.2 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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// This test ensures that there are no long pauses when sending large objects
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// via exit/send.
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import 'dart:async';
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import 'dart:isolate';
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import 'latency.dart';
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Future<void> main() async {
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final statsFuture =
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measureEventLoopLatency(const Duration(milliseconds: 1), 4000, work: () {
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// Every 1 ms we allocate some objects which may trigger GC some time.
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for (int i = 0; i < 32; i++) {
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List.filled(32 * 1024 ~/ 8, null);
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}
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});
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final result = await compute(() {
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final l = <dynamic>[];
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for (int i = 0; i < 10 * 1000 * 1000; ++i) {
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l.add(Object());
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}
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return l;
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});
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if (result.length != 10 * 1000 * 1000) throw 'failed';
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final stats = await statsFuture;
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stats.report('IsolateSendExitLatency');
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}
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Future<T> compute<T>(T Function() fun) {
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final rp = ReceivePort();
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final sp = rp.sendPort;
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Isolate.spawn((_) {
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final value = fun();
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Isolate.exit(sp, value);
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}, null);
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return rp.first.then((t) => t as T);
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}
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