Performances even worst since hotfix

As title said.
Anyone got the problem ?
Was running at 20-30 rps on some maps (algorithm, 1st room, look on the right) but going strong 60 after that.
Now it’s 60-40 anywhere on that map.
Unplayable.

i5 2500 + 280x.
Fix that crap please, I’m tired of that framerate.