HTML5 Canvas Performance in deviantART muro

The author states, "Javascript array lookups are not particularly fast, so applying a filter to a large canvas can be painfully slow."

I would be interested to see what using typed arrays does to performance: https://developer.mozilla.org/en/JavaScript_typed_arrays

Best performance can only be had on Windows. Firefox 4 can only accelerate so much on the Mac platform. Firefox 4 and IE9 on windows will be significantly better.

Is there any HTML5 solution to generate pretty charts like these in the article?