How efficient is threading in Python?

Question

I heard threading is not very efficient in Python (compared to other languages).

Is this true? If so, how can a Python programmer overcome this?

Answer 1

The threading is efficient in CPython, but threads can not run concurrently on different processors/cores. This is probably what was meant. It only affects you if you need to do shared memory concurrency.

Other Python implementations does not have this problem.