[Bug 56289] Re: Gnome window list causes gnome-panel to eat all CPU

[Aleksander Kamil Modzelewski]

There's only one thread in gnome-panel. I have identified gnome-panel as
the exact program, but it's the window list applet that causes the
slowdown [disabling it causes the problem to go away]. I attached a gdb
session to it and made several backtraces while the gnome-panel got
slow. A new note: the cpu usage goes up only when switching
workspaces/iconyfing some window/otherwise changing the appearance of
the window-list. On other times the whole panel works ok. Applets
working in separate instances (i.e. Tomboy) are not affected at all, but
applets working "inside" gnome-panel process, like the gnome-menu, (I
don't know the exact architecture, just noticed that some applets have
their own processes, so sorry for inprecise wording) are all blocked of
course.

I have attached the backtraces with some annotation.

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Gnome window list causes gnome-panel to eat all CPU
https://launchpad.net/bugs/56289