Re: Redisplay slower in Emacs 28 than Emacs 27

[Eli Zaretskii]

> From: Stefan Monnier <monnier@iro.umontreal.ca>
> Cc: larsi@gnus.org,  ghe@sdf.org,  emacs-devel@gnu.org
> Date: Wed, 09 Dec 2020 16:01:41 -0500
> 
> > Btw, any particular reason for the cutoff of 16 bytes to switch to the
> > "large chunk" branch?
> 
> The reason is that I felt it looked good ;-)
> Well, not only: the "large chunk" branch operates 8bytes at a time on
> 64bit systems, so if we use it on a 15B string it will only consult the
> first 8B which I thought wasn't good enough, whereas I felt that
> ignoring the last 7B of a 23B string was acceptable.

Then perhaps we should look for the optimal cutoff by benchmarking
with different values?