On 3/25/07, David J. Andruczyk <djandruczyk@xxxxxxxxx> wrote: > Has anyone else noticed excessive cpu usage when updating certain > GTK+ (2.10.x) widgets? > > I have a piece of software that updates a set of text fields > (GtkLabel's) and uses progress bars to indicate a quantity > graphically, and am finding excessively high amounts of CPU usage > when these calls are made. Commenting out calls to > "gtk_label_set_text" and "gtk_progress_bar_set_fraction" brings > cpu usage back to near zero levels.. I have profiled my code > extensively using gprof/memprof and the problem is not inside of my > own code fro mwhat the profiler tells me. > > I would NOT expect updating approx 10 labels perhaps 5-10 times per > second (ie. when data chages) on a 1.8Ghz machine be so cpu hungry. > I have code in place ALREADY to prevent unnecessary updates. > Without that bit of code, cpu usage will easily max the machine > even at lower update rates. > > I can only suspect that it's an internal GTK+ or pango issue, as my > own custom widgets (custom automotive gauges, i.e. > http://megatunix.sourceforge.net/cluster.gif) are far more > graphically intensive and I can have multiple instances (about 4-6 > updating at any one time for this informal test) of them updating > at 30x per second and only have a minimal cpu load of about 15% > > Does the label or progress bar code use > gtk_widget_invalidate_region? (I found that to have a major cpu > penalty when developing my custom widgets so I stopped using it in > my design.) > > > > -- David J. Andruczyk > > > > ____________________________________________________________________________________ > Now that's room service! Choose from over 150,000 hotels > in 45,000 destinations on Yahoo! Travel to find your fit. > http://farechase.yahoo.com/promo-generic-14795097 > _______________________________________________ > gtk-list mailing list > gtk-list@xxxxxxxxx > http://mail.gnome.org/mailman/listinfo/gtk-list > This might be a shot in the dark, but have you tried disabling pango's markup processing with this function: http://developer.gnome.org/doc/API/2.0/gtk/GtkLabel.html#gtk-label-set-use-markup HTH, Paul _______________________________________________ gtk-list mailing list gtk-list@xxxxxxxxx http://mail.gnome.org/mailman/listinfo/gtk-list
