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Micro-optimization: Avoid temporary set creation in is_proper_subtype by JukkaL · Pull Request #19463 · python/mypy · GitHub

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Micro-optimization: Avoid temporary set creation in is_proper_subtype - #19463

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JukkaL merged 1 commit into
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opt-5
Jul 16, 2025
Merged

JukkaL merged 1 commit into
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opt-5

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JukkaL commented Jul 16, 2025 •
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This was suggested by @sterliakov in #19384 (comment)

This is a part of a set of micro-optimizations that improve self check performance by ~5.5%.

This is a part of a set of micro-optimizations that improve self check
performance by ~5.5%.
JukkaL requested review from ilevkivskyi and sterliakov July 16, 2025 13:16
JukkaL changed the title Micro-optimization: Avoid temporary set creation is_proper_subtype Micro-optimization: Avoid temporary set creation in is_proper_subtype Jul 16, 2025

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According to mypy_primer, this change doesn't affect type check results on a corpus of open source code. ✅

JukkaL merged commit ca738e5 into master Jul 16, 2025
JukkaL deleted the opt-5 branch July 16, 2025 17:18
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