Re: Speedup insert into treestore

[Emmanuele Bassi <ebassi gmail com>]

Hi Florian,

> > As a workaround, keep your own perl reference to the value returned  
> > from Gtk2::TreeStore::new, to prevent Glib::Object::DESTROY from  
> > releasing that C reference.
>
> Yep, that works very good. That's the good news of all your hard work.
> The downside is: I gain only about 2/10 of a second (about 5 %)...
> I'll have to play a bit more with my code to see where all those
> processor cycles get used up.

Now that we have tracked down some of the "Perl side" of performance,
let me give some advices:

  1. the GtkTreeView widget is *still* not very optimized for speed;
this is bound to change with the next Gtk release, with the awesome
profiling work done by the Gtk people, especially Federico Mena
Quintero;

  2. profiling could be interesting - I don't know if there are native
Perl profiling tools (never really had to profile things in Perl;
usually, I rewrite speed critical sections in C and profile those), but
it there are, then you should really use them; and if not, then even a
poor man's profiling(tm) using printf, Benchmark and Benchmark::Timer or
Test::Benchmark is the right way to go;

  3. you should really try the 'fixed-height-mode' property for
Gtk2::TreeView. ;-)

Ciao,
 Emmanuele.

-- 
Emmanuele Bassi - <ebassi gmail com>
Log: http://log.emmanuelebassi.net