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Speed up type checking by caching argument inference context by JukkaL · Pull Request #19323 · python/mypy · GitHub
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Speed up type checking by caching argument inference context #19323

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Merged
merged 1 commit into from
Jun 21, 2025
Merged

Speed up type checking by caching argument inference context #19323

merged 1 commit into from
Jun 21, 2025

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JukkaL
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@JukkaL JukkaL commented Jun 21, 2025

This speeds up self check by about 1.5% on my computer, according to perf_compare.py:

...
=== Results ===

master                    4.264s (0.0%) | stdev 0.024s 
HEAD                      4.201s (-1.5%) | stdev 0.030s

I noticed this bottleneck when I was looking at a CPU profile generated using the script from #19322.

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

@JukkaL JukkaL merged commit be11ab8 into master Jun 21, 2025
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@JukkaL JukkaL deleted the optimize-arg-infer-ctx branch June 21, 2025 18:58
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@hauntsaninja hauntsaninja hauntsaninja approved these changes

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@JukkaL @hauntsaninja