perf: reuse splines on UVBeam objects

[steven-murray]

Re-uses splines when using beam_list instead of bm_cube. This should give a healthy speedup.

[codecov]

Codecov Report

Merging #45 (e201432) into main (1f24660) will increase coverage by 0.03%.
The diff coverage is 100.00%.

@@            Coverage Diff             @@
##             main      #45      +/-   ##
==========================================
+ Coverage   98.63%   98.66%   +0.03%     
==========================================
  Files           5        5              
  Lines         292      300       +8     
  Branches       58       59       +1     
==========================================
+ Hits          288      296       +8     
  Misses          1        1              
  Partials        3        3              

Impacted Files	Coverage Δ
src/vis_cpu/conversions.py	98.97% <100.00%> (+0.11%)	⬆️
src/vis_cpu/vis_cpu.py	97.43% <100.00%> (-0.05%)	⬇️

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[piyanatk]

All good @steven-murray. I approved.

[r-pascua]

This looks good to me, though I would like to see the test I request. You mentioned that this now depends on a pyuvdata PR that hasn't been merged yet, but I don't quite see how. Could you explain? Is it the check_azza_domain kwarg?

Edit: it looks like some tests are failing due to the number of beam pixels being even, so that should be fixed.

[piyanatk]

Look good @steven-murray . Just one comment that might be unnecessary. I have approved.

[steven-murray]

Thanks @r-pascua and @piyanatk -- I've made the relevant changes.

To your question, @r-pascua, yes the update is the check_azza_domain parameter, which will become available in pyuvdata soon.