No, and there couldn't realistically be one either. JITs compile to native machine code, but this is transforming LLVM IR, a typed assembly language. It might

No, and there couldn't realistically be one either. JITs compile to native machine code, but this is transforming LLVM IR, a typed assembly language. It might be possible with http://bellard.org/jslinux/ http://bellard.org/jslinux/ , but I wouldn't expect great performance.