Date: Thu, 31 Jan 2002 23:09:50 -0600 From: Steven A <salyari@cs.uchicago.edu> To: parv <parv_@yahoo.com> Cc: freebsd-questions@freebsd.org Subject: Re: PERL way too slow on cat operation; me wonders what is going on Message-ID: <20020131230950.B15426@abyss.cs.uchicago.edu> In-Reply-To: <20020201050637.GA4068@moo.holy.cow>; from parv_@yahoo.com on Fri, Feb 01, 2002 at 12:06:37AM -0500 References: <20020131212634.A13452@abyss.cs.uchicago.edu> <20020201050637.GA4068@moo.holy.cow>
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yea it is a typo
oops
this doesnt change anything, i still have the problem
cat 80megfile.ps | perl cat.pl > output.ps
vs
cat 80megfile.ps | cat - > output.ps
the first takes 8 minutes the second takes 3 seconds.
yours,steve
well what version of bsd are you using? did you compile your kernel etc.
what hardware.
yours,
steve
On Fri, Feb 01, 2002 at 12:06:37AM -0500, parv wrote:
> in message <20020131212634.A13452@abyss.cs.uchicago.edu>,
> wrote Steven A thusly...
> >
> > hi,
> >
> > first of all, my uname -a: FreeBSD oberon.cs.uchicago.edu
> > 4.4-RELEASE FreeBSD 4.4-RELEASE #0: Tue Sep 18 11:57:08 PDT 2001
> > murray@builder.FreeBSD.org:/usr/src/sys/compile/GENERIC i386
> >
> > now:
> >
> > the following perl script takes 8 minutes to execute on both of my
> > freebsd systems (two AMD K6-2 300s):
> >
> > cat 80megfile.ps > perl cat.pl > output.ps
> >
> > cat.pl:
> > while($_ = <STDIN>) {
> > print $_;
> > }
>
> > however,
> >
> > cat 80megfile.ps > cat - > output.ps
> >
> > takes 2 seconds on the same system.
> >
> > running that perl script on a debian system takes a few seconds
> > also as does the cat -.
>
> for one thing is the first ">" a typo? shouldn't that be a pipe...
>
> cat file | cat - > anotherfile
> cat file | perl cat.perl > otherfile
>
> ...in any case, it took me 19-20 seconds w/ both the pipe lines,
> unlike the disparity that you are seeing. btw, i used perl 5.6.1.
>
>
> --
>
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