Forgive my naivite, but when I am confused about what I am supposed to be looking for when using Activity Monitor. For instance, I notice most widgets use 0 cpu when not being used (i.e. dashboard not brought up); but they still seem to use RAM. Does this mean they are slowing my machine even not activated? Some widgets (like voice-notes) uses some cpu even when not activated, is this worse? Are "inactive processes" causing no load to my system? Should I be looking at virtual memory too? Can someone explain how this memory stuff affects performance. What exactly should I be concerned about if I'm trying to gague system efficiency to keep processes from overloading and slowing down?