[chj]

Are you 100% sure?

I believe webkit (either in safari or UIWebView) should be able to run JIT, while your custom engine can't.

[United857]

UIWebView doesn't support JS JIT, as it's still running in your process space.

[chj]

thanks, didn't know that. this is really sad.

[loumf]

They would rather do that then open an exploit possibility. As a user, I prefer that trade-off. It would bother me if I relied on PhoneGap or something similar, but in practice, the performance really isn't that bad.