[PR #13362/d041d4d0 backport][3.14] Fix excessive CPU use on decompressing small members

[patchback]

This is a backport of PR #13362 as merged into master (d041d4d).

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 98.26%. Comparing base (47babd8) to head (eec8cc4).
⚠️ Report is 1 commits behind head on 3.14.
✅ All tests successful. No failed tests found.

Additional details and impacted files

@@           Coverage Diff            @@
##             3.14   #13391    +/-   ##
========================================
  Coverage   98.26%   98.26%            
========================================
  Files         135      135            
  Lines       49218    49382   +164     
  Branches     2639     2645     +6     
========================================
+ Hits        48363    48527   +164     
  Misses        675      675            
  Partials      180      180            

Flag	Coverage Δ
CI-GHA	98.31% <100.00%> (+<0.01%)	⬆️
OS-Linux	98.08% <100.00%> (+<0.01%)	⬆️
OS-Windows	95.76% <97.46%> (+<0.01%)	⬆️
OS-macOS	97.27% <97.46%> (-0.01%)	⬇️
Py-3.10	97.48% <100.00%> (+<0.01%)	⬆️
Py-3.11	97.75% <100.00%> (+0.01%)	⬆️
Py-3.12	97.83% <100.00%> (+<0.01%)	⬆️
Py-3.13	97.81% <100.00%> (+<0.01%)	⬆️
Py-3.14	97.92% <100.00%> (+<0.01%)	⬆️
Py-3.14t	96.90% <97.43%> (+<0.01%)	⬆️
Py-pypy-3.11	96.73% <92.89%> (+<0.01%)	⬆️
VM-macos	97.27% <97.46%> (-0.01%)	⬇️
VM-ubuntu	98.08% <100.00%> (+<0.01%)	⬆️
VM-windows	95.76% <97.46%> (+<0.01%)	⬆️
cython-coverage	38.82% <48.73%> (+<0.01%)	⬆️

Flags with carried forward coverage won't be shown. Click here to find out more.

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

[codspeed-hq]

Merging this PR will not alter performance

✅ 72 untouched benchmarks
⏩ 7 skipped benchmarks¹

---

_{Comparing patchback/backports/3.14/d041d4d0fd48c3f0832084d33be16cf1c4835f85/pr-13362 (eec8cc4) with 3.14 (47babd8)}

Footnotes

1. 7 benchmarks were skipped, so the baseline results were used instead. If they were deleted from the codebase, click here and archive them to remove them from the performance reports. ↩