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Date: Fri, 4 Apr 1997 16:16:11 +0700 (OSD)
From: Eugeny Kuzakov <kev@l321.omsk.net.ru>
To: "Alexander V. Lukyanov" <lav@video.yars.free.net>
cc: bugs@freebsd.org
Subject: Re: sscanf is slow on 2.2.1
In-Reply-To: <199704031521.TAA03420@video.yars.free.net>
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On Thu, 3 Apr 1997, Alexander V. Lukyanov wrote:

> The program below works awfully slowly on FreeBSD 2.2.1, and quite normally
> on Solaris 2.5, Linux, Digital Unix etc.
> 
> Linux on i586 100Mhz:
> real    0m26.020s
> user    0m24.240s
> sys     0m0.400s
> 
> FreeBSD 2.1.5 on i586 66Mhz:
>       104.06 real        51.97 user         0.00 sys
My machine:
	P100/32MB/FreeBSD 2.1/Proxy SQUID/router to ISP (33600Kb)/30
logined users:

       30.65 real        29.33 user         0.02 sys
8-()

> 
> FreeBSD 2.2.1 on i586 133Mhz:
>       737.01 real       588.48 user         0.43 sys
> 
> More than 10 times slower than 2.1.5 on a weaker system.
> Obviously, that time is spent inside libc.
> 
> ---
> #include <stdio.h>
> int main()
> {
> int i;
> char str[256];
> for(i=0; i<1000000; i++)
> 	sscanf("abcde","%255[a-zA-Z]",str);
> return 0;
> }
> ---
>    Alexander.
> 

	Best wishes, Eugeny Kuzakov
		Laboratory 321 ( Omsk, Russia )
		kev@l321.omsk.net.ru