That's pretty irrelevant if you don't tell us what browser you were rendering it with.

Yeah, I was going to mention FF4, but didn't want to start a browser preference war. Also, I tend to not be very impressed with things that only work (or work well) on one modern browser, but not others.

It runs about 2 FPS on an iPhone 4. When was your last malware scan?

Weird runs perfectly on my oldish 6000+ AMD with 2 gig of ram.

Probably depends on your browser. Stutters on Camino (~Firefox 3.0) when there are lots of balls, runs OK in safari 5, butter smooth in Opera 11.10 and the latest webkit trunk.

This is on a base 2010 macbook upgraded to 8GB RAM.