asynchronicity solves the problem only when your code is io-bound (that is, you're mostly doing network i/o or disk i/o). If you're doing computation, you're s

asynchronicity solves the problem only when your code is io-bound (that is, you're mostly doing network i/o or disk i/o). If you're doing computation, you're still locked to a single thread by the GIL. Yeah you can use multi-processing, but now you're paying the price of inter-process communication.