numpy.sort is always the bottleneck of any numpy code. I won't suggest numba. That never worked on me, it never stop breaking and complaining with nonsensial e

numpy.sort is always the bottleneck of any numpy code. I won't suggest numba. That never worked on me, it never stop breaking and complaining with nonsensial error message. If I want faster I rather write fortran or nim then compile it to python, instead of broken numba.