| // Copyright (c) 2023, the Dart project authors. Please see the AUTHORS file |
| // for details. All rights reserved. Use of this source code is governed by a |
| // BSD-style license that can be found in the LICENSE file. |
| |
| // Verify that cancelled [Directory.watch] subscriptions do not waste memory. |
| |
| // @dart=2.9 |
| |
| import 'dart:io'; |
| |
| import 'package:expect/expect.dart'; |
| |
| void main() async { |
| final startRss = ProcessInfo.currentRss; //# measure: ok |
| |
| for (var i = 0; i < 1024; i++) { |
| final subscription = Directory.systemTemp.watch().listen((event) {}); |
| await subscription.cancel(); |
| } |
| |
| final endRss = ProcessInfo.currentRss; //# measure: continued |
| final allocatedBytes = (endRss - startRss); //# measure: continued |
| final limit = 10 * 1024 * 1024; //# measure: continued |
| Expect.isTrue(allocatedBytes < limit, //# measure: continued |
| 'expected VM RSS growth to be below ${limit} but got ${allocatedBytes}'); //# measure: continued |
| } |
