IE9 and 10 are rendering my canvas test suite faster than Chrome dev or canary.
I just ran the tests again:
Chrome Canary: 809 tests in 15.714 seconds
IE10: 809 tests in 11.383 seconds
FF16: 809 tests in 26.768 seconds (wtf? this used to be on par with chrome, might be a gpu option I disabled)
edit: Firefox times were off because I apparently had disabled GPU ever since this bug: https://bugzilla.mozilla.org/show_bug.cgi?id=774387
Unfortunately the Firefox canvas bug is still there for non-gpu users. Both FF and Chrome have ignored nearly all non-security canvas bugs that I've filed :(