Well, no. You still have to wait for computation, you still have to wait for network... and you still have to wait for entropy generators, if you use them. It

Well, no. You still have to wait for computation, you still have to wait for network... and you still have to wait for entropy generators, if you use them. It would possible for a part of application (thread) that do not rely on random numbers to be more responsive. But you do not need OS rewrite for that. And, of course, if you are aware that you are waiting for random numbers to draw a map, you want to do something with that in the first place. :-)