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