Noticed lower FPS after updating from 1.32 to 1.34 version.
I had 81FPS high/standard before update and after the update I had 76-77 FPS. Tested several times with Altis benchmark provided by Helo(link available below)
I also tested some of my own missions and noticed lower FPS as well.
I only tested this single player and not online, so I have no clue if the same occurs while playing multiplayer. After I reverted to the Arma3Legacy132 problem was resolved and FPS restored.