Great thanks! Now I could 'track down' `benchmark` and `benchmark-run`...

 And also I have Drew's info-apropos command now to search in multiple
manuals at once,
 so now `info-apropos "timing" would lead me to this answer also (if I
select the right manuals).

On Sun, 23 May 2021 at 17:42, Stefan Monnier <monnier@iro.umontreal.ca>
wrote:

> > I used
> > [the macro posted here](
> >
> https://stackoverflow.com/questions/23622296/emacs-timing-execution-of-function-calls-in-emacs-lisp
> > )
> > to time it. I would vote for adding that macro to Emacs b.t.w., if there
> is
> > not
> > some hidden alternative command already.
>
> `benchmark-call` or `benchmark-elapse` should do the trick.
>
>
>         Stefan
>
>