38 lines
1017 B
JavaScript
38 lines
1017 B
JavaScript
/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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"use strict";
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this.EXPORTED_SYMBOLS = ["ResponsivenessMonitor"];
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const { classes: Cc, interfaces: Ci } = Components;
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function ResponsivenessMonitor(intervalMS = 100) {
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this._intervalMS = intervalMS;
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this._prevTimestamp = Date.now();
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this._accumulatedDelay = 0;
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this._timer = Cc["@mozilla.org/timer;1"].createInstance(Ci.nsITimer);
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this._timer.initWithCallback(this, this._intervalMS, Ci.nsITimer.TYPE_REPEATING_SLACK);
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}
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ResponsivenessMonitor.prototype = {
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notify() {
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let now = Date.now();
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this._accumulatedDelay += Math.max(0, now - this._prevTimestamp - this._intervalMS);
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this._prevTimestamp = now;
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},
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abort() {
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if (this._timer) {
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this._timer.cancel();
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this._timer = null;
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}
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},
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finish() {
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this.abort();
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return this._accumulatedDelay;
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},
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};
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