I also tried clearing all cache and that does absolutly nothing. The problem is progressive, meaning if I open Chrome and go to my Gmail inbox, it works fine for a few minutes but it starts to get a little laggy. After 5-10 minutes, it's clearly laggy. After 20 minutes, it's unusuable. It sort of reminds me of old PC programs that used to have memory leaks or were bad at management memory allocation. The more you use them, the worse the problem gets. That's what it feels like.