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Mypy 2 supports parallel type checking by reading MYPY_NUM_WORKERS; older versions ignore it. This change sets workers to --max-children minus one, which leaves a slot open for mutmut to do work in parallel.
sknigh
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Testing with --max-children 8 and python 2.x saw the type checking step run about 4x faster.
Mypy 2 supports parallel type checking by reading MYPY_NUM_WORKERS; older versions ignore it. This change sets workers to --max-children minus one; which leaves a slot open for mutmut to do work in parallel.