Path: utzoo!utgpu!cs.utexas.edu!wuarchive!uunet!mcsun!ukc!axion!edc!fraser
From: fraser@edc.UUCP (Fraser Orr)
Newsgroups: alt.sources
Subject: Re: Fast strcmp() wanted.
Message-ID: <1646@cherry.edc.UUCP>
Date: 26 Sep 90 16:26:26 GMT
References: <12145@crdgw1.crd.ge.com>
Reply-To: fraser@cherry.UUCP (Fraser Orr)
Organization: Atex European Development Centre, Livingston, Scotland
Lines: 20

In article <12145@crdgw1.crd.ge.com> larocque@jupiter.crd.ge.com (David M. LaRocque) writes:
>After I profiled my C program I discovered that the function
>strcmp() takes one third of my program's CPU time.  I was hoping
>someone may have written their own version of strcmp() that
>outperforms the library's function.

One quick dirty thing I did once was to change

	if (strcmp (a,b)==0)
to
	if (*a==*b && (strcmp(a.b)==0))

I seem to remember a remarkable performance improvement, like about 5
times faster.  Probably due to the fact that the program mainly did
strcmp and the strcmp was pretty bad.

Worth considering anyway.

==Fraser Orr <fraser@edc.uucp> +44 506 416778x206
UseNet: {uunet,sun}!atexnet!fraser JANet: fraser%edc@cs.hw.ac.uk