On Monday 04 September 2006 05:17, Matthias Clasen wrote: > During a recent effort to reduce unnecessary wakeups of userspace > applications (in preparation for tickless kernels), it was brought to > my attention that the GNOME workspace switcher applet wakes up for > every key press in any window on the desktop. > > https://bugzilla.redhat.com/bugzilla/show_bug.cgi?id=204968 > > The same happens with metacity; we're taking ~6 context switches per > key press, which is "not nice" for battery life on laptops.
Hmm. And is that actually a real problem? My maximum typing speed is somewhere around 400CPM (which I consider that to be pretty above-average) and that's ~7 presses per second. I'd expect the cost of basically just ignoring an event to be insignificant to the cost of handling the event in the active application. > A simple solution for this problem is to put the _NET_WM_USER_TIME > property on a separate window. Then applications listening for changes > of the toplevel window properties are not affected by its frequent > changes. > > I'd like to propose the following addition to the EWMH: > > > _NET_WM_USER_TIME_WINDOW WINDOW/32 That feels overly specific. What would be wrong with setting that e.g. on the group leader? > PS I should not forget to mention that Owen already pointed out this > problem and the proposed solution when _NET_WM_USER_TIME was discussed > in 2003: > > http://mail.gnome.org/archives/wm-spec-list/2003-May/msg00047.html "I'm slightly bothered by the idea that the window manager would et woken up (to handle the PropertyChangeNotify) on every keypress and button press. I don't really expect it to be a problem in practice, however." -- Lubos Lunak KDE developer -------------------------------------------------------------- SUSE LINUX, s.r.o. e-mail: [EMAIL PROTECTED] , [EMAIL PROTECTED] Lihovarska 1060/12 tel: +420 284 028 972 190 00 Prague 9 fax: +420 284 028 951 Czech Republic http//www.suse.cz _______________________________________________ wm-spec-list mailing list wm-spec-list@gnome.org http://mail.gnome.org/mailman/listinfo/wm-spec-list
