Using numba or cython

[ntessore]

I am curious if there are any objections to using numba or cython in the core library. For example, if people had negative experiences getting numba/cython code to run on HPC clusters.

As it stands, those packages would offer the most straightforward way to get multiprocessing e.g. for the sampling of galaxies.

[arthurmloureiro]

I don't recall ever having any issues with cython (but I have limited experience with it).

[ntessore]

I have implemented a couple of simple utility functions using numba for the time being. Let's see how this works out.