perf: Optimize len(schema)

[Stranger6667]

No description provided.

[codspeed-hq]

CodSpeed Performance Report

Merging #2194 will improve performances by ×47

_{Comparing dd/improve-len (8ddc3fd) with master (9137858)}

Summary

⚡ 2 improvements
✅ 26 untouched benchmarks

Benchmarks breakdown

	Benchmark	master	dd/improve-len	Change
⚡	test_length[bbci]	54 ms	3.7 ms	×15
⚡	test_length[vmware]	423.3 ms	9 ms	×47

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 98.17%. Comparing base (9137858) to head (8ddc3fd).

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #2194      +/-   ##
==========================================
- Coverage   98.23%   98.17%   -0.07%     
==========================================
  Files         132      132              
  Lines       11054    11054              
  Branches     2312     2312              
==========================================
- Hits        10859    10852       -7     
- Misses        114      118       +4     
- Partials       81       84       +3     

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