OS X runaway process bug redux

It’s back! This time I created a movie of how the cfprefsd process hammers my disk. The times are in microseconds so this must be happening a thousand times a second.

Expand to full screen to see the details.

Update 2016-04-25: It turns out it was related to the threads I had in my Messages app. When I deleted all the threads, my Mac stopped getting slammed at random times for hours on end.