Re: [gtk-list] Re: list speed

[Matthew Brannigan <mab smarty smart net>]

> 
> 
> 
> On Fri, 24 Oct 1997, Sascha Ziemann wrote:
> 
> > Hi,
> > 
> > I wrote a program that shows the X11 colors from rgb.txt. My rgb.txt is
> > 750 lines long and so the list contains 750 items. The resize of that
> > window takes 2 secs on a AMD K6 200. I think that is really slow. Is
> > that normal for a GTK program? I use the Guile-GTK bindings and I am
> > wondering weather it is GTK or because of the Guile-GTK layer that makes
> > it so slow.
> > 
> > You can get the program here:
> > http://www.ping.de/sites/aibon/Programme/GNOME/Colorbrowser/
> 
> I haven't downloaded this program, but I have also noticed a performance 
> problem with lists in GTK.
> 
> I believe (without having done the relevant experiments, admittedly), that
> the fundamental problem is the use of a separate X window for each list
> entry. Gtk currently requires that children of a container must own their
> own window if they are to recieve mouse events. If you look a the 
> scrolledwindow test in testgtk, it has the same problem - on my machine 
> (a 133 Mhz P5), it takes just under 2 seconds to map 400 buttons, almost 
> exactly the same performance as yours after you factor in the difference 
> in machine speeds. I've also noticed a similar problem in the file 
> selection window when there are lots of files.
> 

I've heard of some Motif's out there having a problem with these list boxes 
of large size.  This does seem to be a GTK performance issue.

matt

-- 
--------------------------Matthew Aloysious Brannigan-------------------------
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|                          http://www.smart.net/~mab                         |
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