*JS interpreters have this GC component built in already.* that you cant use wit...

JS interpreters have this GC component built in already.

that you cant use with asmjs. asmjs IS NOT javascript. Mozilla folks may have made you think it is,it is not!!!

you'd need to reimplement a gc on top of asmjs...

It'd makes no sense.

So what is a feature of asm.js that is not in JS?