Configure Mypy parallelism in pyproject.toml - #1958
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Configure
num_workers = "auto"in[tool.mypy]so direct Mypy runs use the project configuration. Remove the ordinary and documentation hook--num-workers=4overrides so both inherit the configured worker count.Keep existing
doccmdexample-worker settings unchanged.Validation: the configured project formatter, Prek configuration validation,
git diff --check, and the ordinary and documentation Mypy Prek hooks pass. Hooks ran sequentially withPREK_CONCURRENT_BATCHES=1.Local benchmark: compiled Mypy 2.4.0 on macOS ARM64, three repetitions per mode, comparing
--num-workers=0with the project default (auto, eight workers on this host). Median cold-cache time changed from 3.403s to 2.194s (1.55× speedup). Median warm-cache time changed from 0.150s to 0.285s. All 12 runs passed with identical output. Fresh Mypy caches isolate the cold runs; timings excludeuvsetup and launcher overhead.