http://dk.reddit.com/r/Planetside/comments/17ud28/stutter_bug_being_caused_by_ui_los_changes/ In short, the new "Check for LoS before showing on the HUD" change has screwed the entire performance. Basically, what the game does, is check the position of every friendly player in view. It's basically like collision detection. It screws over your frames big time because you're basically rendering players you're not meant to be.
