From: Stephen Kratzer <kratzers@pa.net>
To: KhaOsh <ficheironegro@gmail.com>
Cc: linux-c-programming@vger.kernel.org
Subject: Re: String comparison for fixed strings
Date: Wed, 15 Aug 2007 09:18:52 -0400 [thread overview]
Message-ID: <200708150918.52599.kratzers@pa.net> (raw)
In-Reply-To: <9870a8150708150406x6297b877u473bfbbc62949f10@mail.gmail.com>
On Wednesday 15 August 2007 07:06:24 KhaOsh wrote:
> Hello everyone,
>
> In terms of speed what the fastest way of doing a strings comparison
> on fixed strings? Using one of those strcmp() functions or doing the
> following:
>
> (Pseudo code)
> "if (s[0] == 0xa && s[1] == 0xb && s[2] == 0xc)" (etc)
> or
> "if (s[0] == 'A' && s[1] == 'B' && s[2[ == 'C')" (etc)
>
> Thanks for your help.
The function strcmp uses a do/while loop, a conditional to test every
character in the first string against the null character, and pointer
arithmetic, so, in terms of sheer speed, your method would probably be
faster. But, in terms of program clarity, strcmp wins by a mile.
Stephen Kratzer
next prev parent reply other threads:[~2007-08-15 13:18 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-08-15 11:06 String comparison for fixed strings KhaOsh
2007-08-15 13:18 ` Stephen Kratzer [this message]
2007-08-15 14:46 ` Glynn Clements
2007-08-15 17:26 ` Leslie P. Polzer
2007-08-16 1:44 ` Glynn Clements
2007-08-16 7:30 ` Per Jessen
2007-08-16 18:14 ` Glynn Clements
2007-08-17 7:49 ` Per Jessen
2007-08-17 20:22 ` KhaOsh
2007-08-16 1:54 ` Glynn Clements
2007-08-15 18:51 ` Jesse Ruffin
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