buffer: add end parameter #4552

Job	Run time
Build slim tarball	1m 54s
aarch64-darwin: with shared libraries	17m 25s
x86_64-linux: with shared libraries	21m 19s
x86_64-darwin: with shared libraries	44m 47s
aarch64-linux: with shared libraries	17m 47s
	1h 43m 12s

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