buffer: add end parameter #5058

Job	Run time
Build slim tarball	1m 51s
aarch64-darwin: with shared libraries	19m 14s
x86_64-linux: with shared libraries	23m 16s
aarch64-linux: with shared libraries	19m 33s
x86_64-darwin: with shared libraries	38m 35s
	1h 42m 29s

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