If multiprocessing exposed such an option, it would effectively be harder to write non-portable code, which seems like a good thing (to do optionally). You coul

If multiprocessing exposed such an option, it would effectively be harder to write non-portable code, which seems like a good thing (to do optionally). You could then switch on "no, do a sensible fork(2)" purely as a performance optimization. Seems like a pretty obviously good thing to add.