I just tested it against Safari 4 on Snow Leopard on my old 2Ghz Core Duo MacBook, and it smokes Safari in SunSpider and V8's tests (the latter unsurprising as

I just tested it against Safari 4 on Snow Leopard on my old 2Ghz Core Duo MacBook, and it smokes Safari in SunSpider and V8's tests (the latter unsurprising as Google obviously deems their tests important performance points). I didn't do Dromeo. I'm thinking about switching to it for day to day use.