Register allocation isn't super important in JS. Type inference is most important, and it is impossible to do that AOT for JS. With PGO I bet you could do decen

Register allocation isn't super important in JS. Type inference is most important, and it is impossible to do that AOT for JS. With PGO I bet you could do decently for some specific scenarios, but you will necessarily fall off a cliff if execution deviates from your profile.