I use Crashplan for backup on OSX. Tonight I happened to notice that the OSX windowserver process was consistently burning ~25% of a CPU core on my Mac for no reason. I also noticed that Crashplan was backing up my computer at the time.
I decided to try switching the preferences for the Crashplan menu bar icon to disable animation, windowserver’s CPU utilization dropped. I turned animation back on it jumped back up.
Someone should change the default.