Martin Kustermann
84dbb6e0b6
This improves * JIT performance by around 14% * precompiled performance by around 2% on a simple map microbenchmark. Change-Id: I623e2a715a709f89f2514ae30fbb504ee2e31661 Reviewed-on: https://dart-review.googlesource.com/17165 Commit-Queue: Martin Kustermann <kustermann@google.com> Reviewed-by: Vyacheslav Egorov <vegorov@google.com>
60 lines
1.4 KiB
Dart
60 lines
1.4 KiB
Dart
// Copyright (c) 2017, 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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import 'dart:async';
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import 'dart:isolate';
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int globalHash = 0;
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class A {
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int get hashCode => globalHash;
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bool operator ==(other) => true;
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}
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final key = new A();
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other(SendPort sendPort) async {
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// We use a different hash than the main isolate, but the re-hashing on our
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// side happens after this line and should therefore also deserialize the map
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// with a new hash, so we should be able to find the value in the map.
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globalHash = 4321;
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final port = new ReceivePort();
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sendPort.send(port.sendPort);
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final Map map = await port.first;
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sendPort.send(map[key]);
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port.close();
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}
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void launchIsolate(argument) {
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other(argument);
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}
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main() async {
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final r = new ReceivePort();
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final re = new ReceivePort();
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final map = {};
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globalHash = 1234;
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map[key] = 1;
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await Isolate.spawn(launchIsolate, r.sendPort, onError: re.sendPort);
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re.listen((error) => throw 'Error $error');
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final it = new StreamIterator(r);
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await it.moveNext();
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final SendPort port = it.current;
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port.send(map);
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await it.moveNext();
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final otherIsolateMapEntry = await it.current;
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if (map[key] != otherIsolateMapEntry) {
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throw "test failed";
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}
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r.close();
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re.close();
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}
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