I don't know what today happen, but my Chrome now work normally. For long time my Chrome was slow, delayed and sometimes just frozen completely. I suspect it was caused by Avast, because i reinstalled Chrome, disabled HW acceleration, disabled all extensions and nothing helped me. Now works perfectly without any change in my PC, chrome version is same as yesterday and yesterday was my Chrome very slow and freezing. So it is sad if Avast need many months to fix this issue. I am on Win 7 64bit Avast Free.