Open 1.1.0: Lag on entering The End, massively worse after killing dragon

[PhilHibbs]

Version:
1.1.0

What is the bug:
After I visted The End, I started to get a 0.5 second lag spike every 5 seconds.

I went creative and killed the dragon, and the lag became so bad that it became unplayable.

Re-starting Minecraft seems to have fixed it, so it's probably a situational problem.

Mod & Version:


Paste.feed-the-beast.com log:


Can it be repeated:


Known Fix:

 

[PhilHibbs]

The lag returned after a while, and RAM usage was up over 5GB. I'll try reducing the RAM allocated as I've heard that can cause problems.