Commite9b2714

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gh-117151: IO performance improvement, increase io.DEFAULT_BUFFER_SIZE to 128k, fix open() to use max(st_blksize, io.DEFAULT_BUFFER_SIZE)

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1 parent9654daf commite9b2714Copy full SHA for e9b2714

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-3

lines changed

-3

lines changed

Lines changed: 3 additions & 3 deletions

Original file line number	Diff line number	Diff line change
`@@ -23,8 +23,8 @@`
`23`	`23`	`valid_seek_flags.add(os.SEEK_HOLE)`
`24`	`24`	`valid_seek_flags.add(os.SEEK_DATA)`
`25`	`25`
`26`		`-# open() uses st_blksize whenever we can`
`27`		`-DEFAULT_BUFFER_SIZE=8*1024# bytes`
	`26`	`+# open() usesmax(st_blksize, io.DEFAULT_BUFFER_SIZE) when st_blksize is available`
	`27`	`+DEFAULT_BUFFER_SIZE=128*1024# bytes`
`28`	`28`
`29`	`29`	`# NOTE: Base classes defined here are registered with the "official" ABCs`
`30`	`30`	`# defined in io.py. We don't use real inheritance though, because we don't want`
`@@ -249,7 +249,7 @@ def open(file, mode="r", buffering=-1, encoding=None, errors=None,`
`249`	`249`	`pass`
`250`	`250`	`else:`
`251`	`251`	`ifbs>1:`
`252`		`-buffering=bs`
	`252`	`+buffering=max(bs,DEFAULT_BUFFER_SIZE)`
`253`	`253`	`ifbuffering<0:`
`254`	`254`	`raiseValueError("invalid buffering size")`
`255`	`255`	`ifbuffering==0:`

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