And the GTK+ developers haven't fixed this because of what? pride? I've seen this issue in GTK+ for YEARS, and filed bug reports on it for several years only to be shot down and turned away by them. That's disappointing. --- Paul Davis <paul@xxxxxxxxxxxxxxxxxxxxx> wrote: > On Mon, 2007-03-26 at 17:17 -0700, David J. Andruczyk wrote: > > I hadn't tried that as I assumed that it was off by default > unless > > enabled.. > > > > Since a simple test program doesn't show it,. but my app does > and > > the performance hogging goes away when I comment out one line > > (gtk_label_set_text) the problem appears to be internal to GTK> > > > Another fine fellow suggested it may be due to resizing of > widgets > > caused by the label update, and showed me a way to set it to a > > fixed size, but that ahd no effect on cpu usage (still high). > > > > I managed to create a workaround by useing a GtkEntry instead, > and > > working out some trickery to make the entrie's background color > > (normally white) to match it's parent so it blends in and looks > > like a label, and presto, cpu usage went from 40-45% down to 4 > %. > > > > For some reason in my case the label updates seem to be > triggering > > some internal stuff for no good reason. when I get a little > time > > I'll try to extract that section of code int oan isolated test > > case, and if it still shows that I'll file it as a GTK+ bug. > > this is a sort of known "bug". setting the text of a label causes > a > recompute of the label's size, which can propagate up the > containing > widget tree. add Pango into the mix, and that resetting is very > costly. > the same is not true of text entries, because they never resize > based on > their contents. > > evolution, sodipodi (the precursor to inkscape) and a few other > projects > have implimented their own labels that do not do this, for > precisely the > reason you are now discovering. > > (i would have replied sooner, but was away in berlin at the linux > audio > conference with no email access or time) > > --p > > > > -- David J. Andruczyk ____________________________________________________________________________________ It's here! Your new message! Get new email alerts with the free Yahoo! Toolbar. http://tools.search.yahoo.com/toolbar/features/mail/ _______________________________________________ gtk-list mailing list gtk-list@xxxxxxxxx http://mail.gnome.org/mailman/listinfo/gtk-list
