Tests

[mypyc] Specialize `s[i] == 'x'` to a codepoint int compare (#21579) #22493

Job	Run time
Test mypyc suite with 32-bit Python	10m 52s
mypyc runtime tests with py313-macos	7m 49s
Test suite with py314-windows-64	31m 25s
Test suite with py315-ubuntu, mypyc-compiled	15m 56s
Test suite with py311-ubuntu	10m 5s
mypyc runtime tests with py310-ubuntu	7m 34s
Parallel tests with py314-ubuntu, interpreted	27m 1s
Test suite with py314t-ubuntu, mypyc-compiled	18m 24s
Type check our own code (py310-windows-64)	1m 59s
Test suite with py314-ubuntu, mypyc-compiled	15m 55s
Parallel tests with py314-ubuntu, mypyc-compiled	29m 13s
Test suite with py312-ubuntu	10m 38s
Formatting and code style with Black + ruff	1m 56s
Test suite with py310-ubuntu, mypyc-compiled	17m 23s
Parallel tests with py314-windows-64, interpreted	10m 3s
Type check our own code (py310-ubuntu)	1m 13s
Test suite with py313-ubuntu, mypyc-compiled	17m 31s
	3h 54m 57s

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