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1997-01-02 - Re: “Cypher punks” display arrogance and stupidity in the new year

Header Data

From: ichudov@algebra.com (Igor Chudov @ home)
To: cypherpunks@toad.com (Cypherpunks)
Message Hash: 9e83e72a896a8eb26824fbcc08bc3327e5ea8d79d738679f4944973f05637ac3
Message ID: <199701021534.JAA20818@manifold.algebra.com>
Reply To: <T2owZD2w165w@bwalk.dm.com>
UTC Datetime: 1997-01-02 15:38:39 UTC
Raw Date: Thu, 2 Jan 1997 07:38:39 -0800 (PST)

Raw message

From: ichudov@algebra.com (Igor Chudov @ home)
Date: Thu, 2 Jan 1997 07:38:39 -0800 (PST)
To: cypherpunks@toad.com (Cypherpunks)
Subject: Re: "Cypher punks" display arrogance and stupidity in the new year
In-Reply-To: <T2owZD2w165w@bwalk.dm.com>
Message-ID: <199701021534.JAA20818@manifold.algebra.com>
MIME-Version: 1.0
Content-Type: text


Dr.Dimitri Vulis KOTM wrote:
> 
> ichudov@algebra.com (Igor Chudov @ home) writes:
> 
> > Dr.Dimitri Vulis KOTM wrote:
> > >
> > > Here's a neat trick: if you want to list a file with line numbers, try:
> > >
> > > grep -n "^" file
> >
> > cat -n works faster.
> 
> Did you time it?
> 

Yes, I wrote a prog that quickly prints a specified number of lines
(see below). Then I piped the output of that program to cat -n and
grep, respectively, and here's what I got:

manifold::~/tmp==>./a.out 1000000 | /usr/bin/time cat -n > /dev/null
1.32user 0.05system 0:01.62elapsed 84%CPU (0avgtext+0avgdata 0maxresident)k
0inputs+0outputs (46major+17minor)pagefaults 0swaps

manifold::~/tmp==>./a.out 1000000 | /usr/bin/time grep -n '^' > /dev/null
19.75user 0.04system 0:20.71elapsed 95%CPU (0avgtext+0avgdata 0maxresident)k
0inputs+0outputs (88major+26minor)pagefaults 0swaps


The difference is about fifteen times.

	- Igor.


#include <stdio.h>

main( int argc, char *argv[] )
{

  int n = atoi( argv[1] );

  for( ; n; n-- )
    putchar( '\n' );
}

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