targeted conversion to a for loop for just enough inlining

[Shnatsel]

a less invasive alternative to #78 that also improves ARM performance slightly instead of regressing it

[codecov-commenter]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 99.79%. Comparing base (dd00bef) to head (e813a0c).

Additional details and impacted files

@@            Coverage Diff             @@
##             main      #79      +/-   ##
==========================================
- Coverage   99.79%   99.79%   -0.01%     
==========================================
  Files          13       13              
  Lines        2876     2872       -4     
==========================================
- Hits         2870     2866       -4     
  Misses          6        6              

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