Rorax and I have both noted a significant decline in FPS after the 1.2.5 update; I'm not sure which mod has caused it (been too busy with work and all to research), but I did notice that installing Optifine and FastCraft helped a bit with the issue. When I get more available time, I'll try and actually hunt down the issue, but, that won't be anytime soon at the rate things are going. Sorry I couldn't point you in a more exact direction.
- Matt
Thanks for the reply. I'll do some digging around myself

EDIT: Turning the round logs off had maybe a tiny (~5fps at best) difference... but overall, it still has lag.
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