Safari browser is a great product from Apple Corporation, which is always famous by flawless technique and endless perfection-seeking spirit. Safari 3.1 has been the fastest browser in the world since released. We seldom heard of it just because it could only run on Apple Operation system.
SquirrelFish is a register-based, direct-threaded, high-level bytecode engine, with a sliding register window calling convention. It lazily generates bytecodes from a syntax tree, using a simple one-pass compiler with built-in copy propagation.