Re: [gtkmm] Weird slowdown with notebook

[Maurizio Umberto Puxeddu <mauriziopuxeddu yahoo it>]

If you cause some huge amount of work to the X11 server, you will have a
slow refresh rate with an apparently little CPU usage by your
application. I had this kind of behaviour when I did "triple buffering"
by mistake (I didn't know gtk2 was double buffered by default).

Hope it helps somehow,

Maurizio Umberto Puxeddu.

On Tue, 2003-06-03 at 10:27, Jussi Pakkanen wrote:
> Hello all
> 
> I'm coding a rather large level editor program using
> gtkmm. Up to now I have opened the level to be edited
> in a dedicated window. Recently I decided to make the
> GUI tabbed, so every level is in its own page in a
> notebook. This got me very strange behaviour:
> 
> - the first time I resize a window with the notebook
> in it, it automatically resizes itself back to the old
> size, but only after a while
> 
> - keypresses do not go to the widgets (drawing area)
> in the pages at first, banging the cursor keys a while
> fixes this
> 
> - screen refreshes are extremely slow, an order of
> magnitude slower than using separate windows
> 
> The weird thing is that the screen updates' speed is
> the same on debugging, optimised and even profiled
> builds. Profiling data is mostly useless, since it
> claims the program only runs for 13 seconds even if I
> force the program to refresh the screen for several
> minutes. I have checked that only the page that shows
> gets the expose_event, so this setup should be just as
> fast.
> 
> My system is Debian testing with gtkmm 2.0. Any ideas
> on how to fix this?
> 
> 
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