Wow.  The new Safari build has significantly improved JavaScript performance in Apple's SunSpider benchmark. Older Safari 3: 8537.4ms ± 0.3% Safari 3.1: 3152.6ms ± 0.2% The new Firefox beta is no slouch either: Firefox 3 beta 4: 5080.4ms ± 5.7% Firefox 2.0.0.12: 15463.6ms ± 5.7% Full results after the jump.

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