fix: high cpu usage with large amount of channels

[dionisio-bot]

Backport of #37395

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Latest commit: 0da339f

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[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 66.53%. Comparing base (7366e8d) to head (fa21022).
⚠️ Report is 2 commits behind head on release-7.12.2.

Additional details and impacted files

@@                Coverage Diff                 @@
##           release-7.12.2   #37520      +/-   ##
==================================================
- Coverage           66.54%   66.53%   -0.01%     
==================================================
  Files                3392     3392              
  Lines              115843   115829      -14     
  Branches            21387    21381       -6     
==================================================
- Hits                77087    77069      -18     
- Misses              36079    36081       +2     
- Partials             2677     2679       +2     

Flag	Coverage Δ
unit	71.56% <ø> (-0.01%)	⬇️

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