Re: The Emacs master is much slower than the emacs-27 branch.

[Alan Third]

On Thu, Dec 03, 2020 at 09:59:39PM +0100, Mattias Engdegård wrote:
> 3 dec. 2020 kl. 19.15 skrev Alan Mackenzie <acm@muc.de>:
> 
> > I've got pretty much up to date copies of both the master and the
> > emacs-27 branches.
> > 
> > When I run my customary benchmark (see below) on master's src/xdisp.c in
> > master, it's taking around 34s.  On emacs-27, it's taking 22s.
> 
> Confirmed on macOS (Mojave).

Watch out with the NS port: drawing to the screen is slower in Emacs
28 than Emacs 27, but is less likely to produce graphical glitches.

Obviously that doesn't explain what Alan's seeing since he's not using NS.
-- 
Alan Third