I find that a long-running Chrome instance will often start using huge amount of CPU time for no good reason (the Chrome task manager currently reports the "Bro

I find that a long-running Chrome instance will often start using huge amount of CPU time for no good reason (the Chrome task manager currently reports the "Browser" task is using 110% CPU and has used over 18hrs CPU time for my current instance). I've observed this on three different machines, one of which isn't used by me so there shouldn't be too much overlap in terms of sites used etc.