URL of lagging game:
http://www.plazmaburst2.com/?s=2
Set game settings to max (including 60 FPS) and play first level. Once you see alive enemy - shot using weapon binded to key 2. You will notice that screen is not updating during complex calculations but sounds is played well. Test it in Firefox and you will see how it should work and was working before changes made to Pepper Flash Player / Flash Player.
--
Exact same problem here and not just for me.
PepperFlash version Flash Player started to lag in really bad way when running in Google Chrome (and possibly in Opera).
I noticed it when I got contacted by multiple players of my game. I was able to repeat this bug on my computer.
It literally can drop frames for few seconds in case of low performance. It looks like game freezes but sounds and application logic still are being played as usually.
From the other side in Firefox Flash Player lags a little bit when complex calculations occur and does not stop screen refresh.
My configuration: Windows 7, Google Chrome (46.0.2490.71 m), Flash Player (v19.0.0.226).
Configuration of players who contacted me: Windows 10, Google Chrome / Opera.
It seems like it happens to my game and other games too. Through my game was remaining unchanged for a pretty long time now.