čas potrebný na funkciu javascript
console.time("timer"); //start time with name = timer
console.timeEnd("timer"); //end timer and log time difference
čas vykonávania JavaScriptu
var t0 = performance.now();
doSomething(); // <---- The function you're measuring time for
var t1 = performance.now();
console.log("Call to doSomething took " + (t1 - t0) + " milliseconds.");
Čas spustenia funkcie merania Javascript
var startTime = performance.now();
alert('Run some function here');
var endTime = performance.now();
var totalTime=endTime-startTime;// time took to run in milliseconds
alert('Total time:'+totalTime +'ms');