Bring back the velocity perf test

[trontrytel]

The compiler was assuming there is an else at the end (even tho there wasn't) and assuming there was Nothing returned there. Hence the JET failures.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 96.77%. Comparing base (bc5687d) to head (497016e).
Report is 1 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #427      +/-   ##
==========================================
- Coverage   96.77%   96.77%   -0.01%     
==========================================
  Files          40       40              
  Lines        1397     1396       -1     
==========================================
- Hits         1352     1351       -1     
  Misses         45       45              

Components	Coverage Δ
src	98.76% <100.00%> (-0.01%)	⬇️
ext	69.79% <ø> (ø)