time a function js code example

Example 1: timeout javascript

setTimeout(function(){
 	//code goes here
}, 2000); //Time before execution

Example 2: javascript count time

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);