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From: "Ondřej Bílka" <neleai@seznam.cz>
To: kenatmit at gmail dot com <sourceware-bugzilla@sourceware.org>
Cc: glibc-bugs@sourceware.org
Subject: Re: [Bug libc/17087] New: Implement memcasemem()
Date: Wed, 25 Jun 2014 16:40:00 -0000	[thread overview]
Message-ID: <20140625164007.GA15975@domone.podge> (raw)
In-Reply-To: <bug-17087-131@http.sourceware.org/bugzilla/>

On Wed, Jun 25, 2014 at 03:19:01PM +0000, kenatmit at gmail dot com wrote:
> 
> The of function strstr() has the case-insensitive version strcasestr(), but
> memmem() does not have the case-insensitive version memcasemem().
> 
> The memcasemem() version would be useful for optimizing some programs. For
> example Suricata intrustion prevetion and detection code.
> 
That would not help as optimization, a case conversion is more expensive
than detecting end condition and in vectorized implementations it is
faster to detect terminating null than add special casing if detected
byte was before or after end.


  reply	other threads:[~2014-06-25 16:40 UTC|newest]

Thread overview: 7+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2014-06-25 15:19 kenatmit at gmail dot com
2014-06-25 16:40 ` Ondřej Bílka [this message]
2014-06-25 16:40 ` [Bug libc/17087] " neleai at seznam dot cz
2014-06-25 18:30 ` kenatmit at gmail dot com
2014-06-26  8:38 ` fweimer at redhat dot com
2015-08-27 22:22 ` [Bug string/17087] " jsm28 at gcc dot gnu.org
2016-10-24 17:55 ` joseph at codesourcery dot com

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