Re: cc-mode fontification feels random

[Eli Zaretskii]

> Date: Fri, 11 Jun 2021 19:46:10 +0000
> Cc: dancol@dancol.org, rudalics@gmx.at, monnier@iro.umontreal.ca, rms@gnu.org,
>   emacs-devel@gnu.org
> From: Alan Mackenzie <acm@muc.de>
> 
> > > How many buffer lines were in your window?
> 
> > 34.  It was in "emacs -Q".
> 
> Thanks.  I didn't know emacs -Q on a GUI always gave the same window
> height.  On my tty, I get 65 lines.
> 
> So, given your windows are about half the height of mine, our timings
> were broadly comparable.

??? Your window was twice as high, but your times are 30% shorter.
How do you conclude that the times are comparable?