How to profile and get Javascript performance [duplicate]

Answer 1

Though chrome has profiling options inbuilt it does not give precise information about the object.So i prefer using leak-finder-for-javascript tool which helped me in my code.

https://code.google.com/p/leak-finder-for-javascript/

I hope this helps.

Answer 2

Another simple way to test a specific piece of code is to add a timer around it.

var testStart = new Date();

// code to be tested here

$('#jstest').html("selected function: "+ (new Date() - testStart) + " milliseconds");

Where jstest is a span element somewhere visible on your page.