Apple's Safari faster with SquirrelFish Extreme
Apple developer Maciej Stachowiak blogged that:
optimizations, polymorphic inline caching, a lightweight "context threaded" JIT compiler, and a new regular expression engine that uses our JIT infrastructure.
From where I sit, the SquirrelFish Extreme approach sounds different than what either Google or Mozilla are doing - though perhaps they can be complementary (moreso for Google). Bottom line is a massive spead increase that will make WebKit (and Safari) particularly fast and that means a faster iPhone too (which uses Safari).