[CentOS] sendmail and rbl blocking - generating statistics

[William L. Maltby]

On Wed, 2007-03-14 at 22:35 +0000, Will McDonald wrote:
> On 14/03/07, John Summerfield <debian at herakles.homelinux.org> wrote:
> > Ryan Simpkins wrote:
> > >
> > > Am I using time right to measure it?
> > No, you're timing the cat only.

Correct.

> 
> I don't think that's the case, you know. If I run the following:
> 
> [wmcdonald at stella ~]$ ls -lh /tmp/messages.1
> -rw-r--r--  1 root root 4.3M Mar 14 20:03 /tmp/messages.1
> [wmcdonald at stella ~]$ time cat /tmp/messages.1 1> /dev/null
> 
> real    0m0.018s
> user    0m0.001s
> sys     0m0.017s
> 
> [wmcdonald at stella ~]$ time cat /tmp/messages.1 | grep  '*.foo' 1> /dev/null
> 
> real    0m0.047s
> user    0m0.021s
> sys     0m0.026s
> 
> Running both commands repeatedly shows similar time differences, I
> think 'time''s timing the execution time of the whole command.

I'm unsure, but I think that's wrong?

Try time { cat /tmp/messages.1 | grep  '*.foo' 1> /dev/null ; }

This avoids certain overheads and does the job OP really wants?

> 
> Will.
> <snip sig stuff>

--
Bill