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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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