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