Surfin’ Safari - Blog Archive ≫ Introducing SquirrelFish Extreme 
Just three months ago, the WebKit team announced SquirrelFish, a major revamp of our JavaScript engine featuring a high-performance bytecode interpreter. Today we’d like to announce the next generation of our JavaScript engine - SquirrelFish Extreme (or SFX for short). SquirrelFish Extreme uses more advanced techniques, including fast native code generation, to deliver even more JavaScript performance.
WebKit、新JavaScriptエンジン「SquirrelFish Extreme」発表でSafari高速化へ - ITmedia News 
WebKit開発チームによる最新JavaScriptエンジン「SquirrelFish Extreme」は、TraceMonkey、V8よりも高速化を実現しているという。
