29 lines
863 B
JavaScript
29 lines
863 B
JavaScript
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define(function() {
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'use strict';
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/*global performance*/
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/**
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* Gets a timestamp that can be used in measuring the time between events. Timestamps
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* are expressed in milliseconds, but it is not specified what the milliseconds are
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* measured from. This function uses performance.now() if it is available, or Date.now()
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* otherwise.
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*
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* @exports getTimestamp
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*
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* @returns {Number} The timestamp in milliseconds since some unspecified reference time.
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*/
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var getTimestamp;
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if (typeof performance !== 'undefined' && typeof performance.now === 'function' && isFinite(performance.now())) {
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getTimestamp = function() {
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return performance.now();
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};
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} else {
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getTimestamp = function() {
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return Date.now();
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};
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}
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return getTimestamp;
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});
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