Iain Lobb Blog: Help me make this Canvas benchmark faster

I'm doing another round of benchmarks at the moment. This new one is called PirateMark. It tests how many big rotating sprites can run on a particular engine/platform at 960x720 resolution, at 60fps. So far it's not looking very promising for HTML5 canvas - I can't get 60fps even with just 1 sprite, and at 30fps I can only get 10 sprites going. But as you may know, I'm not really a canvas/javascript expert, so maybe you can help. JavaScripters - I am laying down the gauntlet! Make this faster! Please leave suggestions and links to your own version in the comments. Because there's no native sprites with rotation in canvas, the code uses a light framework I wrote at Seb's creative JS course. It may be that I'm doing it hopelessly wrong.