Re: CC Mode with font-lock-maximum-decoration 2

[Eli Zaretskii]

> Date: Tue, 9 Aug 2022 08:00:16 +0000
> Cc: emacs-devel@gnu.org
> From: Alan Mackenzie <acm@muc.de>
> 
> > > > Then what is the importance of these measurements of yours?
> 
> > > They show that an attempt to speed up CC Mode/2 should be concentrating
> > > on the code which isn't fontification code.
> 
> > Please elaborate on this conclusion, because I don't think I
> > understand how you arrived at it, based on your measurements.  With
> > the default value of font-lock-maximum-decoration, the fontifications
> > are also very slow, relatively to other modes.
> 
> I mean CC Mode with font-lock-maximum-decoration = 2, particularly.  The
> fontification in this setup is not slow (72% of Emacs Lisp Mode's
> speed).  The setup as a whole is not fast enough.  Therefore to speed it
> up, fontification is not the aspect to concentrate on.

But if we will never recommend using level 2, those conclusions are
again of no practical value for our users.  Right?