Add more bytestring like functions #201

Job	Run time
i386	7m 31s
arm (arm32v7)	6m 13s
darwin_arm (self-hosted, macOS, ARM64, 8.10.7)	15m 52s
build (ubuntu-latest, 8.0.2, 3.8.1.0)	14m 7s
arm (arm64v8)	4m 44s
darwin_arm (self-hosted, macOS, ARM64, 9.2.6)	11m 2s
build (ubuntu-latest, 8.2.2, 3.8.1.0)	11m 49s
darwin_arm (self-hosted, macOS, ARM64, 9.4.4)	12m 52s
build (ubuntu-latest, 8.4.4, 3.8.1.0)	7m 29s
build (ubuntu-latest, 8.6.5, 3.8.1.0)	7m 25s
build (ubuntu-latest, 8.8.4, 3.8.1.0)	7m 33s
build (ubuntu-latest, 8.10.7, 3.8.1.0)	9m 1s
build (ubuntu-latest, 9.0.2, 3.8.1.0)	8m 55s
build (ubuntu-latest, 9.2.7, 3.8.1.0)	6m 2s
build (ubuntu-latest, 9.4.5, 3.8.1.0)	7m 26s
build (ubuntu-latest, 9.6.1, 3.8.1.0)	7m 41s
build (macOS-latest, 9.4.5, 3.8.1.0)	9m 56s
build (macOS-latest, 9.6.1, 3.8.1.0)	20m 22s
build (windows-latest, 9.4.5, 3.8.1.0)	22m 28s
build (windows-latest, 9.6.1, 3.8.1.0)	18m 53s
	3h 37m 21s

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