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From: Joe Perches <joe@perches.com>
To: git <git@vger.kernel.org>
Subject: grep vs git grep performance?
Date: Thu, 26 Oct 2017 08:02:50 -0700	[thread overview]
Message-ID: <1509030170.10651.59.camel@perches.com> (raw)

Comparing a cache warm git grep vs command line grep
shows significant differences in cpu & wall clock.

Any ideas how to improve this?

$ time git grep "\bseq_.*%p\W" | wc -l
112

real	0m4.271s
user	0m15.520s
sys	0m0.395s

$ time grep -r --include=*.[ch] "\bseq_.*%p\W" * | wc -l
112

real	0m1.164s
user	0m0.847s
sys	0m0.314s



             reply	other threads:[~2017-10-26 15:08 UTC|newest]

Thread overview: 12+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2017-10-26 15:02 Joe Perches [this message]
2017-10-26 15:11 ` grep vs git grep performance? Han-Wen Nienhuys
2017-10-26 15:55   ` Joe Perches
2017-10-26 16:13 ` SZEDER Gábor
2017-10-26 16:20   ` Joe Perches
2017-10-26 16:58 ` Stefan Beller
2017-10-26 17:41   ` Joe Perches
2017-10-26 17:45     ` Stefan Beller
2017-10-27 17:22       ` Joe Perches
2017-10-27 22:11         ` Ævar Arnfjörð Bjarmason
2017-10-27 23:22           ` Joe Perches
2017-10-28  7:45             ` Ævar Arnfjörð Bjarmason

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