refactor: use foldhash in critical path #10297

Job	Run time
markdown_lint	4s
Unit tests on ubuntu-latest	24m 53s
Typos Check	3s
Lints and doc tests on ubuntu-latest	10m 27s
Unit tests on windows-latest	36m 20s
Lints and doc tests on windows-latest	15m 54s
Unit tests on macos-13	13m 28s
Lints and doc tests on macos-13	22m 23s
Unit tests on macos-14	14m 16s
Lints and doc tests on macos-14	8m 10s
Memory leak checks	2m 29s
CI status checks	1s
	2h 28m 28s

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