[PR #9365/d684195b backport][3.11] Speed up the ConnectionKey

[bdraco]

(cherry picked from commit d684195)

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 97.80%. Comparing base (224345e) to head (fbfe159).
Report is 346 commits behind head on 3.11.

✅ All tests successful. No failed tests found.

Additional details and impacted files

@@            Coverage Diff             @@
##             3.11    #9384      +/-   ##
==========================================
- Coverage   97.80%   97.80%   -0.01%     
==========================================
  Files         108      108              
  Lines       35051    35050       -1     
  Branches     4185     4184       -1     
==========================================
- Hits        34280    34279       -1     
  Misses        574      574              
  Partials      197      197              

Flag	Coverage Δ
CI-GHA	97.67% <100.00%> (-0.01%)	⬇️
OS-Linux	97.36% <100.00%> (-0.01%)	⬇️
OS-Windows	94.85% <100.00%> (-0.01%)	⬇️
OS-macOS	97.05% <100.00%> (-0.01%)	⬇️
Py-3.10.11	96.92% <100.00%> (-0.01%)	⬇️
Py-3.10.15	96.86% <100.00%> (-0.01%)	⬇️
Py-3.11.10	96.93% <100.00%> (-0.01%)	⬇️
Py-3.11.9	97.00% <100.00%> (+<0.01%)	⬆️
Py-3.12.6	97.40% <100.00%> (-0.01%)	⬇️
Py-3.13.0-rc.2	97.38% <100.00%> (-0.01%)	⬇️
Py-3.9.13	96.83% <100.00%> (-0.01%)	⬇️
Py-3.9.20	96.77% <100.00%> (-0.01%)	⬇️
Py-pypy7.3.16	96.38% <100.00%> (-0.01%)	⬇️
VM-macos	97.05% <100.00%> (-0.01%)	⬇️
VM-ubuntu	97.36% <100.00%> (-0.01%)	⬇️
VM-windows	94.85% <100.00%> (-0.01%)	⬇️

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