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From: dot@dotat.at (Tony Finch)
Subject: [TUHS] Short history of 'grep'
Date: Mon, 1 Feb 2016 10:48:04 +0000	[thread overview]
Message-ID: <alpine.LSU.2.00.1602011044300.21662@hermes-2.csi.cam.ac.uk> (raw)
In-Reply-To: <56AE4029.7010701@mhorton.net>

Mary Ann Horton <mah at mhorton.net> wrote:

> It's not a typo.
>
> When I tell this story to nontechical folks, I prefix it with the brief note
> that fgrep ought to be fastest, because it's simple, and egrep ought to be
> slowest, because it's complex, but in reality fgrep is slowest and egrep is
> fastest.  Otherwise the story makes no sense.

Does fgrep win if you are matching lots of fixed strings?

https://en.wikipedia.org/wiki/Aho%E2%80%93Corasick_algorithm

Tony.
-- 
f.anthony.n.finch  <dot at dotat.at>  http://dotat.at/
Trafalgar: North or northwest 4 or 5. Moderate or rough. Fair. Good.


  parent reply	other threads:[~2016-02-01 10:48 UTC|newest]

Thread overview: 20+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2016-01-30  3:00 Warren Toomey
2016-01-30 19:10 ` Mary Ann Horton
2016-01-30 19:44   ` Dave Horsfall
2016-01-30 20:20     ` Mary Ann Horton
2016-01-30 20:40       ` Dave Horsfall
2016-01-30 21:42         ` Marc Rochkind
2016-01-31  1:41           ` Dave Horsfall
2016-01-31  1:50             ` Larry McVoy
2016-01-31  2:06             ` jason-tuhs
2016-01-31  4:20               ` Random832
2016-01-31 17:11               ` Mary Ann Horton
2016-01-31 17:38                 ` John Cowan
2016-02-01 10:48                 ` Tony Finch [this message]
2016-01-31  2:37             ` John Cowan
2016-02-01 10:38               ` Tony Finch
2016-02-01 19:26                 ` scj
2016-01-31 17:01 Doug McIlroy
2016-03-05  1:48 ` Dave Horsfall
2016-03-05  1:54   ` Larry McVoy
2016-02-01 20:57 Doug McIlroy

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