If you haven't already, try disabling your canvas ruler. If that sems to fix
the lag, you're looking at bug #736411, which took a while to track down and
fix but the good news is it's patched by now and will be available in the next
Numbers may not lie, but neither do they tell the whole truth.
> Date: Wed, 26 Aug 2015 08:05:05 +0200
> From: for...@gimpusers.com
> To: email@example.com
> CC: notificati...@gimpusers.com
> Subject: [Gimp-user] Gimp Hold mouse lag
> >*Link fix:*
> It is a Gnome 3 Gimp lag error or bug. My CPU shoots up from 8% all the way to
> 70% when I just click the brush. It works better in Unity and Gnome Classic
> slight lag, but not noticeable if you don't go wild. It doesn't do so well in
> Ubuntu 2D Either, but not as bad as Gnome 3.
> I have no idea what happened to Gimp....
> zutokaza (via www.gimpusers.com/forums)
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