Optimization: make State final and avoid construction via cls()#20838
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Optimization: make State final and avoid construction via cls()#20838
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Constructions via cls() was pretty slow due to the large number of keyword arguments, as this used a generic calling convention.
ilevkivskyi
approved these changes
Feb 17, 2026
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According to mypy_primer, this change doesn't affect type check results on a corpus of open source code. ✅ |
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Construction via cls() was pretty slow, possibly due to the large number of keyword arguments, as this used a generic calling convention because of mypyc limitations. This might improve performance of mostly cached, huge incremental builds by 1-2% perhaps, if the CPU profiles I looked at are to be trusted.