Fix compressed get request benchmark payload length

[bdraco]

The payload length was much smaller than expected because zlib more efficient than expected and previous testing to calculate the payload size was incorrect

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 98.70%. Comparing base (2b135a8) to head (945dede).
Report is 1 commits behind head on master.

✅ All tests successful. No failed tests found.

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #9844      +/-   ##
==========================================
- Coverage   98.70%   98.70%   -0.01%     
==========================================
  Files         118      118              
  Lines       36174    36172       -2     
  Branches     4297     4297              
==========================================
- Hits        35706    35704       -2     
  Misses        315      315              
  Partials      153      153              

Flag	Coverage Δ
CI-GHA	98.59% <100.00%> (-0.01%)	⬇️
OS-Linux	98.28% <100.00%> (-0.01%)	⬇️
OS-Windows	96.07% <100.00%> (-0.01%)	⬇️
OS-macOS	97.36% <100.00%> (-0.01%)	⬇️
Py-3.10.11	97.20% <100.00%> (-0.01%)	⬇️
Py-3.10.15	97.81% <100.00%> (+0.05%)	⬆️
Py-3.11.10	97.81% <100.00%> (+<0.01%)	⬆️
Py-3.11.9	97.26% <100.00%> (+<0.01%)	⬆️
Py-3.12.7	98.35% <100.00%> (+<0.01%)	⬆️
Py-3.13.0	98.33% <100.00%> (+0.05%)	⬆️
Py-3.9.13	97.13% <100.00%> (-0.01%)	⬇️
Py-3.9.20	97.72% <100.00%> (+0.05%)	⬆️
Py-pypy7.3.16	97.29% <100.00%> (-0.01%)	⬇️
VM-macos	97.36% <100.00%> (-0.01%)	⬇️
VM-ubuntu	98.28% <100.00%> (-0.01%)	⬇️
VM-windows	96.07% <100.00%> (-0.01%)	⬇️

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[codspeed-hq]

CodSpeed Performance Report

Merging #9844 will improve performances by 8.21%

_{Comparing compressed_get_request (945dede) with master (2b135a8)}

Summary

⚡ 1 improvements
✅ 22 untouched benchmarks

🆕 1 new benchmarks
⁉️ 1 (👁 1) dropped benchmarks

Benchmarks breakdown

	Benchmark	master	compressed_get_request	Change
👁	test_five_get_requests_with_567296_compressed_chunked_payload[pyloop]	122 ms	N/A	N/A
🆕	test_get_request_with_251308_compressed_chunked_payload[pyloop]	N/A	465.1 ms	N/A
⚡	test_one_thousand_large_round_trip_websocket_text_messages[pyloop]	25.3 ms	23.4 ms	+8.21%

[patchback]

Backport to 3.10: 💚 backport PR created

✅ Backport PR branch: patchback/backports/3.10/fabf3884d645ff923214293485f9c2204d03e0c2/pr-9844

Backported as #9845

🤖 @patchback
I'm built with octomachinery and
my source is open — https://github.com/sanitizers/patchback-github-app.

[patchback]

Backport to 3.11: 💚 backport PR created

✅ Backport PR branch: patchback/backports/3.11/fabf3884d645ff923214293485f9c2204d03e0c2/pr-9844

Backported as #9846

🤖 @patchback
I'm built with octomachinery and
my source is open — https://github.com/sanitizers/patchback-github-app.