Minor updates, improve thread suspension. #1007

Job	Run time
build (ubuntu-pypy3)	7m 15s
build (ubuntu-py38-cython-checkbin)	11m 34s
build (windows-py39-cython)	10m 11s
build (windows-py310-cython-checkbin)	9m 49s
build (windows-py311-cython)	9m 28s
build (ubuntu-py311-cython)	7m 59s
build (ubuntu-py312-cython-checkbin)	11m 35s
build (windows-py312-cython-checkbin)	7m 39s
build (ubuntu-py313-cython)	8m 23s
build (windows-py313-cython)	10m 15s
	1h 34m 8s

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