Re: Mysterious fontification/C++ context issue

[Alan Mackenzie <acm@muc.de>]

Guten Tag, David!

On Sun, Dec 10, 2006 at 01:46:40PM +0100, David Kastrup wrote:
> Alan Mackenzie <acm@muc.de> writes:

> > With Martin Rudalics's optimisation to c-beginning-of-defun-raw, I
> > don't feel that the slowness is too bad any more (though he does
> > ;-).  In the extreme case xdisp.c, scrolling to EOB and M-v is
> > mildly sluggish (about half a second), on my 5 year old Athlon 1.2
> > GHz machine.  A typical new PC now is, say, 3 GHZ.  In the time
> > Emacs 22 is the current release, a typical new PC will come to be
> > around 20 GHz, and this slowness will not matter.

> Please, arguments like that are just not acceptable.  If examples with
> barely tolerable behavior can be come across easily, you can bet that
> there will be normal use cases where the the behavior will be quite
> intolerable.  And even on faster machines, editing should try avoiding
> draining unnecessary CPU power: editing is by far the most important
> application where you want to have a long battery life for laptops.

> I am working with a 600MHz laptop, and my occasionally used desktop
> system has a 233MHz processor.  The preview-latex
> <URL:http://www.gnu.org/software/auctex/preview-latex.html> package
> has been streamlined to operate well on such machines.  It would be
> really a bad hoax if syntax highlighting (which does a lot less) would
> make such machines unusable for editing with an up-to-date Emacs with
> default settings.

Hey, just calm down a bit and take a few long deep breaths!  You've
snipped my argument and left only the supporting discussion.  I'm NOT
arguing that anybody should have this "barely tolerable behaviour"
thrust upon him; the user should be able to set his system up as he
wishes.  I'm merely saying that in a few years time the point will be
moot.  And that for Emacs 23, we will be able to set the default value
of open-paren-...-start  to nil, just as in Emacs 22 font-locking is
enabled by default.

Hopefully Emacs will always be such that wierdos who, for whatever
reason, want to run with font-lock disabled, or on bare TTYs, or on
early 1990s machines can do so comfortably.  ;-)

[ .... ]

> -- 
> David Kastrup, Kriemhildstr. 15, 44793 Bochum

-- 
Alan Mackenzie (Ittersbach, Germany)