There are two schools 1) Load everything statically, then run the app 2) Just load enough to show the start screen, then load the rest when needed or in the bac

There are two schools 1) Load everything statically, then run the app 2) Just load enough to show the start screen, then load the rest when needed or in the background. Only the first school would see a significant speedup. eg 30% of 3s vs 30% of 30ms. I wonder however if you would be able to pre-optimize? I guess not because JS is a dynamic language.