RE: More accurate time feedback
> -----Original Message-----
> From: Dave Sherohman [mailto:esper@sherohman.org]
> Sent: Thursday, October 25, 2001 12:58 PM
> To: debian-user@lists.debian.org
> Subject: Re: More accurate time feedback
>
>
> On Thu, Oct 25, 2001 at 09:06:29AM -0700, Andrew Agno wrote:
> > Dave Sherohman writes:
> > > faster than a quicksort.) If you are required to use a
> small data
> > > set, just perform more repetitions to get measurable data.
> >
> > This also allows you to obtain statistics like standard
> deviations and
> > confidence intervals.
>
> Umm... No. If you run 10,000 reps and only measure the total time
> (because each rep is too quick to be measured individually), you can
> only determine the mean time per rep. You'd need the individual rep
> times to derive any other stats, unless there are some fancy
> techniques that I'm not aware of. (If you do 2 reps and only measure
> that the total time is 10 ms, you have no way of knowing whether the
> individual times were 5 ms and 5 ms or 1 ms and 9 ms. This makes
> computing anything other than the mean rather difficult.)
>
You might run many batches of 1,000 reps. The statistics of that
population would be useful, if the error in the time measurement
is small enough.
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