[obtu]

How is it like LuaJIT? The calling convention thing means they have a method JIT, the assembly isn't hand-written, and I don't anything in the commit message that relates to this list of LuaJIT's innovations: http://article.gmane.org/gmane.comp.lang.lua.general/58908

I'd be curious in seeing more JITs using crankshaft's approach: generate machine code directly, that both executes the original js and gathers runtime feedback.

[olliej]

The "old" baseline jit (the middle tier) is a simple "method" hit in the same vein as V8, it executes directly and accumulates runtime type info -- the still takes longer to generate and uses more memory than the interpreter. A lot of short run programs take less time to run than to do codegen for (JSONP for instance can do really unpleasant things to codegen time)