* seq_file optimization?
@ 2017-07-01 2:48 Joe Perches
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From: Joe Perches @ 2017-07-01 2:48 UTC (permalink / raw)
To: Alexey Dobriyan; +Cc: Andrew Morton, LKML
About this commit in mm:
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commit c1aca87fb3f84a813fb3dda656bbee583c9c87a3
Author: Alexey Dobriyan <adobriyan@gmail.com>
Date: Fri Jun 30 11:02:04 2017 +1000
fs/seq_file.c: delete small-value optimization
num_to_str() optimizes printing small integers [0..9], so the same check
higher in callchain is unnecessary.
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Is removing this optimization really the same speed?
I don't think so.
The num_to_str call still does multiple moves of
memory to the output, this is a single byte copy.
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2017-07-01 2:48 seq_file optimization? Joe Perches
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