I have a perhaps naive question: what's the expected impact of the JIT on battery life? Seems like the extra number crunching might have an impact. Regardless of whether or not people want us generating native code on mobile devices, does it generally make more sense to use the stack VM on mobile devices?

FWIW, I think 10-15% better performance is still a f@(&!?g big deal on dog slow devices! Oh, this stuff just makes my whole year fantastic.

Of course, the question may be a bit premature since we don't have a JIT for ARM yet:)