Re: [gtkmm] glademm get_widget_derived

[Christer Palm <palm nogui se>]

Murray Cumming Comneon com wrote:
> > From: Christer Palm [mailto:palm nogui se] 
> >
> > If I call Gnome::Glade::Xml::create() more than once on the 
> > same file, 
> > will the XML file be parsed all over again?
>
> Yes, I believe so.

The reason I ask is because the glade docs 
(http://developer.gnome.org/doc/API/libglade/gladexml.html#GLADE-XML-NEW) 
claims that "Note also that the XML parse tree is cached to speed up 
creating another GladeXML object for the same file", but I couldn't find 
the code where the caching occurs.

I just wrote a little test program and ran strace on it, and it sure 
does appear that this claim is a lie - it _does_ reparse the XML.

> Personally I don't optimise without proof that it makes any difference,
> particularly when that optimisation just makes life more difficult.

That sure is a sensible standpoint.

I ran some tests and, FYI, it _does_ make a difference. Absolutely 
significant for a non-trivial interface. It also takes significant time 
to parse the full XML (about 0.4s in my case, but that's on a 2.4GHz 
P4), so it should make sense to go the split XML files way, as long as 
libglade/libglademm works the way it does today.

--
Christer Palm