perf: Fix binview growable complexity O(n*m) -> O(n)

[ritchie46]

fixes #15615

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 81.26%. Comparing base (b09a709) to head (abdd60c).
Report is 3 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main   #15628   +/-   ##
=======================================
  Coverage   81.26%   81.26%           
=======================================
  Files        1371     1371           
  Lines      175779   175775    -4     
  Branches     2531     2531           
=======================================
  Hits       142839   142839           
+ Misses      32464    32460    -4     
  Partials      476      476           

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[codspeed-hq]

CodSpeed Performance Report

Merging #15628 will not alter performance

_{Comparing binview (abdd60c) with main (92902e6)}

Summary

✅ 22 untouched benchmarks