Not a good idea with hand-coded ROMs for CPUs that are in single-digit MHz that use interrupts liberally, it would cause code cache invalidation a lot.
Some stats for SML2 running (Audio ON (web audio for mac in about:flags for chrome, mozAudio for Firefox 4), scaling OFF):
Some stats for SML2 running (Audio ON (web audio for mac in about:flags for chrome, mozAudio for Firefox 4), scaling OFF):
Chrome 12: http://i.imgur.com/JjpT5.jpg 27.0% CPU load
Firefox 4: http://i.imgur.com/yEzzw.jpg 68.6% CPU load