If you don't want to use C (I don't blame you if you don't) you could use Cython or Numba. And certainly in my number crunching code the amount of code that ac

If you don't want to use C (I don't blame you if you don't) you could use Cython or Numba. And certainly in my number crunching code the amount of code that actually crunches numbers, and thus could really benefit from being written in a GIL releasing way, is really quite small.