I recently ditched Mac OSX and reverted to Ubuntu on my MacBook Air. It immediately felt snappier, but I figured that was probably my imagination. For interests sake I ran the V8 benchmark test v7 over and over again this evening and found that in Ubuntu I get around 8500 whereas on OSX I get around 7900. So it wasn't my imagination after all.

Do any of you know if that performance difference is because I'm using 64 bit Ubuntu whereas OSX runs in 32 bit mode? Or is it just that Ubuntu is more efficient?
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