Re: g_type_instance_is_a (was Cairo 1.3 performance loss)

["Daniel Amelang" <daniel amelang gmail com>]

On 25 Jan 2007 21:16:23 +0100, Soeren Sandmann <sandmann daimi au dk> wrote:
> "Daniel Amelang" <daniel amelang gmail com> writes:
>
> > So, the tessellator behavior that you're seeing is interesting and
> > deserves some looking into. But I can't help but notice in your
> > profiles that g_type_instance_is_a takes up 3x the CPU that the
> > tessellator does. And with the old tessellator, g_type_instance_is_a
> > takes 9x the CPU the tessellator does. Now, I'm not a GTK guru, and I
> > have a lot of confidence in the GTK developers, so what's the story?
>
> Note that development versions of GTK+ have much more debugging code
> turned on which among other things means many more calls to
> g_type_instance_is_a(). So be sure to compare apples to apples. (Not
> saying you didn't).

Good point. I don't know, these profiles come from Jorn, and only he
knows the details behind what was compiled and how (flags, etc). Jorn?

Dan