Imac user here using the Razer Mamba mouse and my meter has always been near perfect using the Flash Version.
I don't use the Razer software But.....Firefox was my goto browser until 2 years ago when I started getting meter "Run on" so I tried Safari and guess what back to near perfect meter.
I have 24 GB memory and keep my machine clean.May I suggest using the app Clean my Mac.Other than that its trail and error.