Question

I have some Javascript that is reading in some XML. There is an older function which was used to create a JSON object from that data, and I’ve written a new function that I hope will create that JSON object faster.
What is the easiest and best way to determine which function is performing faster? It’s a decent amount of data, so it’s somewhat important to know.
Thanks.

Answer 1

You could use console.time("ID"); and console.timeEnd("ID"); (info here), and look the results in the Chrome Developer Tools or Firebug like so:

console.time("oldFunc");
//oldfunc();
console.timeEnd("oldFunc");

console.time("newfunc");
//newfunc();
console.timeEnd("newfunc");

Also, you could use jsperf