But we also need to so how SquirrelFish stacks up against TraceMonkey and V8. Here are the Sunspider results for SquirrelFish Extreme, V8 and TraceMonkey (run on a 2.16 GHz MacBook Pro):
SquirrelFish Extreme: 943.3 ms
V8: 1280.6 ms
TraceMonkey: 1464.6 ms
SquirrelFish accomplishes its speed improvements by implementing bytecode optimizations, polymorphic inline caching, a lightweight “context threaded” JIT compiler, and a new regular expression engine that uses our JIT infrastructure.