Re: What is a typical precision of gettimeofday()?

Hannu Krosing <hannuk@google.com>

From: Hannu Krosing <hannuk@google.com>
To: Laurenz Albe <laurenz.albe@cybertec.at>
Cc: Tom Lane <tgl@sss.pgh.pa.us>, pgsql-hackers@lists.postgresql.org
Date: 2025-07-09T11:14:06Z
Lists: pgsql-hackers
Yes, this should say average

On Wed, Jul 9, 2025 at 8:42 AM Laurenz Albe <laurenz.albe@cybertec.at> wrote:
>
> On Tue, 2025-07-08 at 18:17 -0400, Tom Lane wrote:
> > One other thing that bothers me as I look at the output is
> >
> >       Per loop time including overhead: 731.26 ns
> >
> > That's stated in a way that makes it sound like that is a
> > very solid number, when in fact it's just the average.
> > We see from these test cases that there are frequently
> > a few outliers that are far from the average.  I'm tempted
> > to rephrase as
> >
> >       Average loop time including overhead: 731.26 ns
> >
> > or some variant of that.  Thoughts?
>
> I think that is a good idea.
>
> Yours,
> Laurenz Albe