Robert Nystrom
e4c8b49dcc
Change-Id: I1362ada67a02b0ed352612fc29c727e94d8cd254 Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/394901 Commit-Queue: Daco Harkes <dacoharkes@google.com> Auto-Submit: Bob Nystrom <rnystrom@google.com> Reviewed-by: Daco Harkes <dacoharkes@google.com>
51 lines
1.2 KiB
Dart
51 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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// @dart=2.9
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import 'dart:async';
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import 'dart:typed_data';
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import 'dart:math' as math;
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import 'dart:isolate';
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import 'latency.dart';
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main() async {
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final statsFuture = measureEventLoopLatency(
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const Duration(milliseconds: 1),
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4000,
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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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);
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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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