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

[Eli Zaretskii]

> From: Stefan Monnier <monnier@iro.umontreal.ca>
> Cc: acm@muc.de,  gregory@heytings.org,  mattiase@acm.org,  larsi@gnus.org,
>   emacs-devel@gnu.org
> Date: Sat, 05 Feb 2022 13:04:36 -0500
> 
> >> BTW, currently, it's not just `EQ` that's slower but also `XSYMBOL` and
> >> `SYMBOLP`.
> > Where's the data which says what functions/macros became slower with
> > this change?
> 
> Nowhere.  It's just that its code has gotten slightly more complex (an
> additional test or two).  As I said, I don't know if it ever has any
> measurable impact.  I just mentioned it for completeness's sake.

I think it's high time we actually measured the impact by using perf.
Otherwise this discussion is just a lot of hand-waving and "I said, he
said" kind of argument.  We will never be able to establish whether
the slowdown is real in actual Emacs usage or just in
micro-benchmarks.