Android 2.2 Handily Beats iOS4 in JavaScript Benchmarks

Pretty dramatic performance difference. I think Android 2.2’s JavaScript performance gains are from JIT compilation, which isn’t possible under iOS 4.0 because of a security feature where once a page in memory is marked writeable, it can never be made executable. It’s a nice security feature, but one that comes at the expense of significant potential performance gains.

★ Thursday, 22 July 2010