Bug/Issue Never mind.

Disregard topic, we figured out a solution. Still would like some optimization, maybe, but main issue has been corrected.

Recently me and one friend of mine have decided to head to an empty planet and colonize basically the entire thing. We've gotten about five houses down, no problems. Then we build a somewhat sizable apartment complex (12 rooms, each are about 8x16 blocks) along with an area below it (very sizable, but also entirely empty at the moment). We noticed after building this, we've been having some SEVERE issues with NPCs and other players lagging all over the place, to the point where the game reaches near unplayable levels VERY quickly.

While we do have a sizable list of mods, we can say with confidence that this issue is NOT related, as every item we have placed as well as all materials used thus far have been vanilla. We have experienced nearly zero issues with this kind of problem UNLESS we had a lot of NPCs going on at once. We emptied out the apartment complex, but it didn't change anything. Even tried rebooting the server, but alas, no change. Also examined the area in question offline, and the issues persisted even in single player.

This issue is not present on many other planets, but we have managed to recreate it once or twice near other, random colonies. Vanilla type planets and vanilla type races. All equipment presently being used for these tests are vanilla, as well, to clear that up, so it should IN THEORY not be the cause, considering we have tried Frackin Universe planets and other races and have not experienced any of these lag issues other than the general lag that comes from trying to load a planet super quickly.

We've narrowed it down to one of three causes:
- Too many unique blocks in one area causing loading issues
- Too many NPCs in one area causing script pressure
- Overall bad block texture and code optimization

PC Specifications:
Intel i5 4690k @ 3.5 GHz
AMD R9 280X 3GB
16GB DDR3 Memory
ASUS Z97-A MoBo
256GB SSD
190 MBP/s Down / 60 MBP/s Up Internet Connection