I have noticed in the last week or so that Chromium on all of my Ubuntu 15.10 installations takes 10-15 seconds to start up, whereas before it would start up almost immediately. Initially I now get a black window, and then it fills in many seconds later. Turning off all extensions speeds this up slightly, but not that much. Very annoying; Firefox now starts up much faster so I've almost completely stopping using Chromium. Anyone else notice this? Possible cures?