buffer: add end parameter #5292

Job	Run time
Build slim tarball	2m 30s
aarch64-darwin: with shared libraries	20m 59s
x86_64-linux: with shared libraries	20m 32s
aarch64-linux: with shared libraries	18m 59s
x86_64-darwin: with shared libraries	32m 43s
	1h 35m 43s

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