The native browsers have a lock on HTML5 performance, with Safari grabbing an easy victory on OS X, and IE9 taking the lead on Windows 7. Chrome places second on OS X, while Firefox is the Windows 7 runner-up. Google and Mozilla trade places for third , while Opera finishes last on both OSes.
The charts below contain the geometric mean and average results of the individual GUIMark2 HTML5 tests, followed by Asteroids and the HTML5 Canvas Performance Test.
(The nice popular ones like ABP, Lazarus, Greasemonkey all have equivalents; some lesser-used plugins like Rikaichan also have ports by now. Only a matter of time!)
as always, a great read.
Testing these browsers at stock doesn't reveal even an eighth of the picture.