Internal speedup for calculating line opacities

[jvshields]

I changed some code to use vectorization and appropriate broadcasting to eliminate some for loops. For an 1000 angstrom wide spectrum with 0.01 angstrom wide bins, this reduces the calculation time by a factor of ~2. Considering that this is most computationally expensive part of the code, this offers a substantial speedup to stardis.

This change doesn't seem to show much in the benchmarks because we use a very small simulation in that case. This mainly gives significant speedups for large simulations that calculate many lines at many frequency bins.

[codecov]

Codecov Report

Attention: 2 lines in your changes are missing coverage. Please review.

Comparison is base (eba2b6d) 68.09% compared to head (1569426) 68.28%.

Files	Patch %	Lines
...adiation_field/opacities/opacities_solvers/base.py	77.77%	2 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #167      +/-   ##
==========================================
+ Coverage   68.09%   68.28%   +0.18%     
==========================================
  Files          31       31              
  Lines        1163     1154       -9     
==========================================
- Hits          792      788       -4     
+ Misses        371      366       -5     

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.

[tardis-bot]

*beep* *bop*
Hi human,
I ran benchmarks as you asked comparing main (eba2b6d) and the latest commit (1569426).
Here are the logs produced by ASV.
Results can also be downloaded as artifacts here.
Significantly changed benchmarks:

All benchmarks:

All benchmarks:

     before           after         ratio
   [eba2b6dc]       [15694266]
        349±4ms          332±5ms     0.95  run_stardis.BenchmarkStardis.time_calc_alpha
    11.9±0.06ms      11.9±0.06ms     1.00  run_stardis.BenchmarkStardis.time_raytrace
     1.68±0.01s          1.66±0s     0.99  run_stardis.BenchmarkStardis.time_run_stardis