[zbanks]

I set up a jsperf to do some benchmarking:

http://jsperf.com/noisy

If you can help out by running the tests, it'll be great to compare browsers.

This isn't exactly the perfect tool for the job, but it's close enough.

[flat20]

I moved this line out of the for loop which made it slightly faster:

var numPixels = options.intensity * Math.pow(options.size, 2);

http://jsperf.com/noisy/2