Re: Time to merge scratch/correct-warning-pos into master, perhaps?

[Eli Zaretskii]

> Date: Sun, 6 Feb 2022 11:50:02 +0000
> Cc: gregory@heytings.org, monnier@iro.umontreal.ca, mattiase@acm.org,
>   larsi@gnus.org, emacs-devel@gnu.org
> From: Alan Mackenzie <acm@muc.de>
> 
> > So that would mean the slowdown of EQ is due to the cases where the
> > objects are not-EQ?
> 
> Yes.
> 
> > Where are the numbers that show how much slower is the current EQ, for
> > the case of EQ and not-EQ objects?
> 
> We don't have any such numbers.  Is it even possible to measure this?  On
> earlier processors, we could have just counted up processor cycles used
> for each instruction, but not any more.

Yes, it's possible: use perf.