OdinMonkey uses the existing IonMonkey compiler to do the actual optimization and code generation work. This blog post has more information [0]; see especially

OdinMonkey uses the existing IonMonkey compiler to do the actual optimization and code generation work. This blog post has more information [0]; see especially the comments section where the author responds to some questions and discusses the relationship between OdinMonkey and regular JS compilation. [0] https://blog.mozilla.org/luke/2013/03/21/asm-js-in-firefox-nightly/ https://blog.mozilla.org/luke/2013/03/21/asm-js-in-firefox-n...