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1 // Copyright (c) 2011, the Dart project authors. Please see the AUTHORS file | 1 // Copyright (c) 2011, the Dart project authors. Please see the AUTHORS file |
2 // for details. All rights reserved. Use of this source code is governed by a | 2 // for details. All rights reserved. Use of this source code is governed by a |
3 // BSD-style license that can be found in the LICENSE file. | 3 // BSD-style license that can be found in the LICENSE file. |
4 | 4 |
| 5 part of dart.core; |
| 6 |
5 /** | 7 /** |
6 * A simple [Stopwatch] interface to measure elapsed time. | 8 * A simple [Stopwatch] interface to measure elapsed time. |
7 */ | 9 */ |
8 abstract class Stopwatch { | 10 abstract class Stopwatch { |
9 /** | 11 /** |
10 * Creates a [Stopwatch] in stopped state with a zero elapsed count. | 12 * Creates a [Stopwatch] in stopped state with a zero elapsed count. |
11 * | 13 * |
12 * The following example shows how to start a [Stopwatch] | 14 * The following example shows how to start a [Stopwatch] |
13 * right after allocation. | 15 * right after allocation. |
14 * | 16 * |
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121 | 123 |
122 int get elapsedMilliseconds { | 124 int get elapsedMilliseconds { |
123 return (elapsedTicks * 1000) ~/ frequency; | 125 return (elapsedTicks * 1000) ~/ frequency; |
124 } | 126 } |
125 | 127 |
126 int get frequency => _frequency(); | 128 int get frequency => _frequency(); |
127 | 129 |
128 external static int _frequency(); | 130 external static int _frequency(); |
129 external static int _now(); | 131 external static int _now(); |
130 } | 132 } |
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