I/O and other small fixes #63

Job	Run time
linux (ubuntu-latest, x86_64)	3m 43s
linux (ubuntu-latest, x86)	5m 56s
macos (macos-12, x86_64)	4m 46s
linux (ubuntu-latest, aarch64)	4m 5s
musllinux (ubuntu-latest, x86_64)	3m 44s
macos (macos-14, aarch64)	3m 7s
linux (ubuntu-latest, armv7)	4m 21s
musllinux (ubuntu-latest, x86)	3m 38s
linux (ubuntu-latest, s390x)	5m 3s
musllinux (ubuntu-latest, aarch64)	3m 46s
linux (ubuntu-latest, ppc64le)	4m 2s
musllinux (ubuntu-latest, armv7)	3m 56s
sdist	14s
windows (windows-latest, x64)	6m 50s
Release	23s
	57m 34s

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