Module import takes a long while

[hombit]

Bug report

import hipscat takes ~5s on my laptop (Apple M2Pro) and ~8-9s on Bridges2 (AMD Epyc 7742). In some cases it takes up to two minutes to import it on Bridges2.

cProfile shows that it may be connected to numba compilation and dynamic library loading, but further investigation is needed.

Part of the call graph for the 2-minute import case (Bridges2)

Part of the call graph for a "normal" 5s import case (laptop). Times do not count, because 5s is the wall time, while time shows 200% CPU usage

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• I have described the situation in which the bug arose, including what code was executed, information about my environment, and any applicable data others will need to reproduce the problem.
• I have included available evidence of the unexpected behavior (including error messages, screenshots, and/or plots) as well as a descriprion of what I expected instead.
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[smcguire-cmu]

This should be closed by #395 , can you test it?

[hombit]

It is 1.5-2.5 faster now. I haven't profiled it yet