Re: cc-mode fontification feels random

[Eli Zaretskii]

> Date: Thu, 10 Jun 2021 16:46:11 +0000
> Cc: dancol@dancol.org, monnier@iro.umontreal.ca, rudalics@gmx.at,
>   emacs-devel@gnu.org, rms@gnu.org
> From: Alan Mackenzie <acm@muc.de>
> 
> > > That variable is still supported by CC Mode (with the exception of AWK
> > > Mode, where it surely is not needed).
> 
> > Does it make a difference, performance-wise?  If not (which is what
> > ISTR), then that variable isn't really "supported", because supporting
> > it means that different values of it cause tangible differences in
> > performance.
> 
> Yes, it does make a difference.  On my machine, the times to scroll
> through xdisp.c with my favourite benchmark for
> font-lock-maximum-decoration set to 3, 2, 1 are 23s, 7.5s, 5.5s.

Then I suggest to set it to 2 by default.