Re: [gtkmm] Custom TreeStore Problems

[Christof Petig <christof petig-baender de>]

darco schrieb:
> I am trying to implement a Custom TreeStore using GtkMM. Unable to find 

> The source code to this example can be found here:
> ftp://ftp.voria.net/pub/customtreestore.tar.gz (Or if you prefer http, 
> use http://ftp.voria.net/pub/customtreestore.tar.gz )

The sourcecode is no longer accessible there. Can you repost it or send 
me a copy? I get the same gobject error.

Reason:
Porting our apps from gtk1 to gtk2 came to a halt when I realized that 
out use of TreeStore is many times slower than our custom Tree-like 
class which I mapped to a CList (with reasonably well performance).

Inserting 10k rows into a 4 column (text only!) treestore (no treeview 
attached!!!) takes 16s here (and I need more than 100k). I profiled for 
2 days and only found out that the time is not spent in any of (my 
program,gtkmm,glibmm,pango,pangoft,gtk and some more I do not remember).

It _seems_ that using Children() and lower_bound (I'm creating a sorted 
tree out of multi column data (putting all items with a same column 
content into a subtree)) to find the correct place to insert is slow.

I also tried
http://mail.gnome.org/archives/gtk-list/2003-March/msg00361.html
which I consider too slow for the things it tries to accomplish, too.

So I went on to measure a minimal! custom treestore implementation.
   Christof