I've been having the same problems now for quite some time. I disabled the pepper flash in my chrome settings and it was smooth for a few days. I also use CC cleaner and always have everything cleaned out before I get ready to play. Made zero difference in the way my meter has been acting. I even used gamebooster programs to try and fix this issue.
But I finally caved and decided to try one of the browsers most everyone else was suggesting such as maxthon or comodo.
The reason I didn't want to get a new browser to play on was because I was sick of jumping through hoops just to play this game!
I decided to go with comodo and let me just say WOW best hoop I ever jumped through in order to fix my meter woes. My meter is smooth as it can be and I havent had it act jumpy or lag out on me once yet.
Give it a try and I'm telling you that it makes all the difference! Thanks to reading the forums I now have a smooth meter and couldn't be happier with the game.
Hopefully it will help you and give you that nice meter speed that makes the game more enjoyable.
Cheers