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Re: emacs23 uploaded to unstable

On 2009-08-02 10:38 +0200, Florian Weimer wrote:

> * Sven Joachim:
>> I haven't tried emacs23 yet, but on recent emacs-snapshot packages I did
>> not experience much of a slowdown compared to emacs22.  There is often a
>> delay when Emacs has to display characters that cannot be represented
>> with the current fontset; in this case it takes time to find a a
>> suitable font.  However, subsequent scrolling should be fast.
> Perhaps it's also somewhat related to the X server.  Most of the CPU
> usage during scrolling is in the X server.  CPU load with Emacs 22 is
> very low, though.
> On my system, the redisplay activity is almost noticeable.  There is a
> slight effect, as if it were painted top-down (similar to those slide
> effects in presentations).

This must be a problem of the video driver.  Scrolling through the HELLO
file coming with Emacs, I see the CPU load of Emacs going up (and there
is indeed some redisplay lag), but Xorg's CPU usage stays close to 0.


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