Re: need advice: "gtk_tree_view slow"

[Owen Taylor <otaylor redhat com>]

On Thu, 2003-08-28 at 21:03, Bert Marco Schuldes wrote:
> Hallo.
>
> I started two days ago to write my first application using GTK,
> but I am pretty experienced with C.
>
> I have read about the problems with gtk_tree_view being
> too slow:
>
> > Even worse. It takes about 6 seconds for 1000 rows.
> > Under M$ Windows it takes longer (23 sec).
>
> My application (windows) uses a single-column tree which can grow 
> easily to more than 1000 entries. Something like "23 secs" would be 
> totally unacceptable. 
>
> - Is this a general problem when using gtk_tree_view, or was the
>   case mentioned some "special" case?
>
> - should I better use gtkctree, to avoid this problem, even though
>   deprecated?

A) Make sure you have Pango-1.2.5. It has significant performance
   improvements on Windows.

B) It shouldn't take 23 seconds or 6 seconds to add a thousand
   rows on any sort of moderately fast machine.

   The most common performance traps with GtkTreeView are:

   - Adding rows to a sorted model 1-by-1. Add all your rows,
     then turn on sorting.

   - Auto-resize columns can make things much slower;
     GTK_TREE_VIEW_COLUMN_AUTOSIZE should generally be avoided
     for models of more than a few hundred rows.

     (Though if you can add all your data to the model before
     putting it into the GtkTreeView, it's probably OK. The problem
     is that every time a single row is changed, GTK+ needs to check
     the size of all rows.)

Regards,
                                                Owen