Re: Gtk Performance changes from 2.6 -> 2.12

["Dirk-Jan C. Binnema" <dirk-jan binnema nokia com>]

On Tue, 22 Nov 2005, ext John Rice wrote:

> Sean McGrath who works on Solaris performance ran some tests with 
> GtkPerf and turned up the following results.
> 
> Any thoughts on why such a big regression (44%) in Gtk performance in 
> Gnome 2.6 [bundled] and 2.12? Is it cairo or something else? GtkTextView 
> - Scroll looks particulary hot at 130%.

FYI, we did some profiling as well for the 770-platform, Gtk+2.6 vs
Gtk+ 2.8. There's some huge slowdowns, and it seems it's because of the
float stuff in Cairo... We don't have an FPU in the current 770
hardware, so... 

(in the report 'hard float' means using the kernel fpu-emulator, while
'soft float' means that the compiler 'inlines' floating point handling
code - much faster)

Here it is: http://maemo.org/community/gtk_vs.html


Best wishes,
Dirk.