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Copy pathstopwatch.ts
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40 lines (31 loc) · 1.19 KB
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/*---------------------------------------------------------------------------------------------
* Copyright (c) Microsoft Corporation. All rights reserved.
* Licensed under the MIT License. See License.txt in the project root for license information.
*--------------------------------------------------------------------------------------------*/
import { globals } from 'vs/base/common/platform';
const hasPerformanceNow = (globals.performance && typeof globals.performance.now === 'function');
export class StopWatch {
private _highResolution: boolean;
private _startTime: number;
private _stopTime: number;
public static create(highResolution: boolean = true): StopWatch {
return new StopWatch(highResolution);
}
constructor(highResolution: boolean) {
this._highResolution = hasPerformanceNow && highResolution;
this._startTime = this._now();
this._stopTime = -1;
}
public stop(): void {
this._stopTime = this._now();
}
public elapsed(): number {
if (this._stopTime !== -1) {
return this._stopTime - this._startTime;
}
return this._now() - this._startTime;
}
private _now(): number {
return this._highResolution ? globals.performance.now() : new Date().getTime();
}
}