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28 lines
1.1 KiB
JavaScript
28 lines
1.1 KiB
JavaScript
/*---------------------------------------------------------------------------------------------
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* Copyright (c) Microsoft Corporation. All rights reserved.
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* Licensed under the MIT License. See License.txt in the project root for license information.
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*--------------------------------------------------------------------------------------------*/
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const hasPerformanceNow = (globalThis.performance && typeof globalThis.performance.now === 'function');
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export class StopWatch {
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static create(highResolution) {
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return new StopWatch(highResolution);
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}
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constructor(highResolution) {
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this._now = hasPerformanceNow && highResolution === false ? Date.now : globalThis.performance.now.bind(globalThis.performance);
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this._startTime = this._now();
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this._stopTime = -1;
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}
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stop() {
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this._stopTime = this._now();
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}
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reset() {
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this._startTime = this._now();
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this._stopTime = -1;
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}
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elapsed() {
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if (this._stopTime !== -1) {
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return this._stopTime - this._startTime;
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}
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return this._now() - this._startTime;
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}
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}
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