Tests

Parse files in parallel when possible #21581

Job	Run time
Test mypyc suite with 32-bit Python	9m 48s
Test suite with py312-ubuntu	9m 33s
mypyc runtime tests with py313-macos	7m 1s
Type check our own code (py310-ubuntu)	1m 47s
Test suite with py311-ubuntu	8m 55s
Test suite with py314-ubuntu, mypyc-compiled	15m 14s
Formatting and code style with Black + ruff	1m 59s
Type check our own code (py310-windows-64)	2m 12s
mypyc runtime tests with py310-ubuntu	6m 25s
Test suite with py310-ubuntu, mypyc-compiled	15m 51s
Test suite with py313-ubuntu, mypyc-compiled	15m 25s
Parallel tests with py314-ubuntu, mypyc-compiled	27m 10s
Parallel tests with py314-windows-64, interpreted	9m 46s
Parallel tests with py314-ubuntu, interpreted	25m 35s
Test suite with py314-windows-64	28m 16s
Test suite with py314t-ubuntu, mypyc-compiled	19m 12s
	3h 24m 9s

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