Groups | Search | Server Info | Keyboard shortcuts | Login | Register [http] [https] [nntp] [nntps]


Groups > comp.lang.c > #18713

Re: More efficient strcmp

From James Kuyper <jameskuyper@verizon.net>
Newsgroups comp.lang.c
Subject Re: More efficient strcmp
Date 2012-03-13 18:19 -0400
Organization A noiseless patient Spider
Message-ID <4F5FC802.70401@verizon.net> (permalink)
References <jjog0d$rcc$1@speranza.aioe.org>

Show all headers | View raw


On 03/13/2012 05:59 PM, pembed2012 wrote:
> Dear friends
> 
> I have created a more efficient strcmp function. However it only works on 
> big endian architectures. I would like someone with same to run some 
> timing tests to see how much is the speed up.
> 
> Thank you
> 
> int strcmp_fast(char* s,char* t){
>   uls=(unsigned long*)s;
>   ult=(unsigned long*)t;
>   if(*uls>*ult) return(1);
>   if(*uls<*ult) return(-1);
>   else return(strcmp(s,t));
> }

char strings[0] = "a\0a\0b";

Compare the results of strcmp(strings, strings+2) and
strcmp_fast(strings, strings+2).

Fast is nice; defined behavior is better; correct behavior is even better.

Back to comp.lang.c | Previous | Next — Previous in thread | Next in thread | Find similar | Unroll thread


Thread

More efficient strcmp pembed2012 <once@was.enough.invalid> - 2012-03-13 21:59 +0000
  Re: More efficient strcmp Kleuske <kleuske@nowhere.net> - 2012-03-13 22:16 +0000
    Re: More efficient strcmp "BartC" <bc@freeuk.com> - 2012-03-13 22:25 +0000
      Re: More efficient strcmp Kleuske <kleuske@nowhere.net> - 2012-03-14 16:02 +0000
    Re: More efficient strcmp James Kuyper <jameskuyper@verizon.net> - 2012-03-13 18:30 -0400
    Re: More efficient strcmp Kaz Kylheku <kaz@kylheku.com> - 2012-03-13 23:05 +0000
  Re: More efficient strcmp James Kuyper <jameskuyper@verizon.net> - 2012-03-13 18:19 -0400
    Re: More efficient strcmp jacob navia <jacob@spamsink.net> - 2012-03-13 23:54 +0100
    Re: More efficient strcmp Gareth Owen <gwowen@gmail.com> - 2012-03-14 06:37 +0000
      Re: More efficient strcmp James Kuyper <jameskuyper@verizon.net> - 2012-03-14 07:32 -0400
  Re: More efficient strcmp Stephen Sprunk <stephen@sprunk.org> - 2012-03-13 17:28 -0500
  Re: More efficient strcmp Robert Wessel <robertwessel2@yahoo.com> - 2012-03-13 17:28 -0500
  Re: More efficient strcmp Ben Bacarisse <ben.usenet@bsb.me.uk> - 2012-03-13 22:43 +0000
    Re: More efficient strcmp "Joachim Schmitz" <nospam.jojo@schmitz-digital.de> - 2012-03-16 17:39 +0100
      Re: More efficient strcmp Ben Bacarisse <ben.usenet@bsb.me.uk> - 2012-03-16 18:17 +0000
  Re: More efficient strcmp Kaz Kylheku <kaz@kylheku.com> - 2012-03-13 23:03 +0000
    Re: More efficient strcmp Fritz Wuehler <fritz@spamexpire-201203.rodent.frell.theremailer.net> - 2012-03-14 15:55 +0100
      Re: More efficient strcmp Kenneth Brody <kenbrody@spamcop.net> - 2012-03-14 14:19 -0400
  Re: More efficient strcmp "BartC" <bc@freeuk.com> - 2012-03-13 23:25 +0000
  Re: More efficient strcmp Bl0ckeduser <bl0ckedusersoft@gmail.com> - 2012-03-13 21:42 -0500
    Re: More efficient strcmp Tim Rentsch <txr@alumni.caltech.edu> - 2012-03-14 15:17 -0700
      Re: More efficient strcmp Bl0ckeduser <bl0ckedusersoft@gmail.com> - 2012-03-14 19:06 -0400
        Re: More efficient strcmp Tim Rentsch <txr@alumni.caltech.edu> - 2012-03-15 18:53 -0700
  Re: More efficient strcmp Andre <lodwig@pathme.de> - 2012-03-14 14:26 +0100
  Re: More efficient strcmp China Blue Water Navy <chine.bleu@yahoo.com> - 2012-03-14 12:39 -0700
  Re: More efficient strcmp vaysagekv <kvvaysage@gmail.com> - 2012-03-15 18:24 +0530
    Re: More efficient strcmp gof@somewhere.invalid (Gof) - 2012-03-15 13:00 +0000
      Re: More efficient strcmp "BartC" <bc@freeuk.com> - 2012-03-15 15:05 +0000
        Re: More efficient strcmp Jorgen Grahn <grahn+nntp@snipabacken.se> - 2012-03-25 16:45 +0000

csiph-web