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.");var start = new Date().getTime();
for (i = 0; i < 50000; ++i) {
// do something
}
var end = new Date().getTime();
var time = end - start;
alert('Execution time: ' + time);<html>
<head>
<title>JavaScript setHours Method</title>
</head>
<body>
<script>
var dt = new Date();
dt.setHours( dt.getHours() + 2 );
document.write( dt );
</script>
</body>
</html>var start = new Date();
//do some think that takes a while here
var runTime = new Date() - start;
console.log("Script took:"+runTime+" Milliseconds to run");// Start your timer
let time1 = performance.now();
// Perform your Loop
for (let i = 0; i <= 10; i++) {
console.log(i);
}
// End your timer
let time2 = performance.now()
// Log the time it took to complete
console.log(`Your loop took ${time1 - time2} milleseconds`);