Re: new emacs24 settings (was: Re: Performance problems (CPU 100%) with NULs in files)

[Le Wang <l26wang@gmail.com>]

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On Sat, Sep 24, 2011 at 1:58 AM, Eli Zaretskii <eliz@gnu.org> wrote:

>
> > next-line
> What was the value of line-move-visual?  Under the default non-nil
> setting, next-line is pretty expensive.
>

it was t, setting it to nil didn't help bibi-display much.


>  > >  What kind of text?  What was the major mode in that buffer?
> >
> > emacs-lisp large file
>
> How large?
>
>
allout.el >200k not very large.  large enough to scroll continuously  for 10
seconds of so.

Does it matter whether you are close to the file's beginning or to its
> end?
>
> Does anything change if, after visiting the file, you first type
>
>  M-: (font-lock-default-fontify-buffer) RET
>
and only then try scrolling?
>

no.


> > I also use full font-lock salad colors with "Consolas" font on Windows.
> > Also I use several minor-modes that add pre or post-command-hooks.
>
> If you remove those pre/post-command hooks, does the scrolling speed
> improve significantly?  Can you find a hook that has the most profound
> effect?


no it does not.  the effect of all hooks is about 2-3% CPU.

 > > Does it behave better if you set redisplay-dont-pause to a non-nil
> > > value?  This will be the default in Emacs 24.
> > >
> >
> > It's not making a noticeable difference.
>
> With or without bidi-display-reordering?  I asked about its effect
> when bidi-display-reordering is left at its default t value.
>

I tried it with bidi and without, difference wasn't huge.

-- 
Le

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