Question

How to calculate elapsed time in JavaScript

Answer 1

<script type="text/JavaScript">   

var start = new Date();

var sum = 0;
for (var i = 0; i < 10000000; i++)   
    sum += i;

var end = new Date();
var elapsed = end.getTime() - start.getTime(); // elapsed time in milliseconds

document.write("sum = " + sum + " elapsed = " + elapsed);


/*
run:

sum = 49999995000000 elapsed = 26  

*/

</script>

 

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