Now do computation in those threads and realize that they all wait on the GIL giving you single core performance on computation and multi threaded performance on io.
I think OP is making a joke about python’s GIL, which makes it so even if you are explicitly multi threading, only one thread is ever running at a time, which can defeat the point in some circumstances.
Now do computation in those threads and realize that they all wait on the GIL giving you single core performance on computation and multi threaded performance on io.
Correct, which is why before I had said
Ups, my attention got trapped by the code and I didn’t properly read the comment.