More tests, benchmarks, and profiling loops

[make-github-pseudonymous-again]

This branch implements the new tests, benchmarks, and profiling loops required by #108 and #120.

[codecov-commenter]

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Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 98.46%. Comparing base (96a58a6) to head (a2ee7ff).
⚠️ Report is 371 commits behind head on main.
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Additional details and impacted files

@@            Coverage Diff             @@
##             main     #223      +/-   ##
==========================================
+ Coverage   98.20%   98.46%   +0.26%     
==========================================
  Files          49       49              
  Lines        1282     1371      +89     
==========================================
+ Hits         1259     1350      +91     
+ Misses         23       21       -2     

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