Re: [gnome-love] Projects using GObject

[Emmanuele Bassi <ebassi gmail com>]

On Mon, 2007-05-07 at 15:48 -0300, Fabrício FX wrote:
> --- Emmanuele Bassi <ebassi gmail com> escreveu:
>
> > I used GObject to implement the Dictionary utility,
> > in order to provide
> > the backend and infrastructure. you can have a look
> > at it in GNOME SVN
> > repository for gnome-utils:
>
> A long time ago, I asked in gtk-app-devel-list about
> develop a application that uses *a lot* of GObjects in
> memory (more than 10.000 objects, allocating and
> deallocating several times). The people said me to
> don´t use GObject because it will add a high overhead
> in my application.

the size of each single GObject instance is 12 bytes, and it has been so
for a lot of time; to this figure you must (obviously) add the size of
your own instance data and a one-off allocation for the class structure.
for all that matters, 12 bytes per instance is not what I define "high
overhead", especially on desktop machines, but YMMV.

>  But now, with GSlice system I don´t
> know if it´s viable. Could anyone say anything about
> that?

the slice allocator helps when allocating lots of data in small, evenly
sized chunks, by not letting you hit the system malloc() and free().
it's not the solution to every issue - otherwise it would have been
called the panacea allocator - but it can definitely help.

ciao,
 Emmanuele.

-- 
Emmanuele Bassi,  E: ebassi gmail com
W: http://www.emmanuelebassi.net
B: http://log.emmanuelebassi.net