I suspect you might be right, but I am far from certain - can you elaborate? My concerns are about things like PICs, but code generation is possible, so replac

I suspect you might be right, but I am far from certain - can you elaborate? My concerns are about things like PICs, but code generation is possible, so replacing functions to change PICs is one way to implement them. This is, I think, how the Graal project does JavaScript and Ruby, and they get very good performance.