Put the summary of the bug you're having here
What I expected to happen was...:
I was in snapshot 13w05a+, and just loading up a world has a frame-drop, I'm not sure if its a rendering issue or what, but my computer is pretty decent, and I normally get around 200+ FPS Max Settings, but as of snapshot 13w05a, my frames are at about 80-100, again, Max Settings. I've seen other people complain about the same issue, so I know it's not just me.
What actually happened was...:
I got quite a significant frame-drop.
Steps to Reproduce:
1.Load up a world.
Duplicate of MC-8824, please use the search function to see if your bug has already been submitted. Currently over 51% of tickets are being closed as duplicate.