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window.performance.now() wrapper for profiler use
/**
* @constructor
*/
function Profiler() {
}
/**
* Uses the best resolution timer that is currently available.
* The return value of this can only be used for measuring the time interval,
* and *MUST NOT* be used to get the absolute current time.
*
* Make sure now to change any global variable/state. (Do not override the window.performance object,
* but just maintain a reference to the browser function if you just want to use it)
*
* @return {Number}
*/
Profiler.time = (function() {
var perf = window.performance || {};
var fn = perf.now || perf.mozNow || perf.webkitNow || perf.msNow || perf.oNow;
// fn.bind will be available in all the browsers that support the advanced window.performance... ;-)
return fn ? fn.bind(perf) : function() { return new Date().getTime(); };
})();
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