It compromises performance in a similar way to using any byte code vs final machine code. It remains to see how much of a VM support will be required to make th

It compromises performance in a similar way to using any byte code vs final machine code. It remains to see how much of a VM support will be required to make this work, as that's typically the large overhead cost of using non-machine code. If anything the same exact FSAIL will run faster and faster on the same exact hardware as newer JITs come out.