Speed up eq #1070

Job	Run time
Build & verify package	14s
Verify dev env (ubuntu-latest)	2m 58s
Check types using pyright	20s
Verify dev env (windows-latest)	6m 23s
Tests on pypy-3.8	43s
Tests & Mypy on 3.7	45s
Tests on pypy-3.9	41s
Build docs & run doctests	16s
Tests on pypy-3.10	50s
Tests & Mypy on 3.8	27s
Tests & Mypy on 3.9	51s
Tests & Mypy on 3.10	1m 2s
Tests & Mypy on 3.11	49s
Tests & Mypy on 3.12	1m 13s
Tests & Mypy on 3.13	42s
Combine & check coverage.	7s
required-checks-pass	3s
	18m 24s

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