Forge: 14.23.3.2655
Mods: Dynamic Trees: 0.7.6 (nothing more)
After launching clear forge server i see this message when i generate world or just fly around:
"Dynamic Trees loaded a new chunk [x, y] in dimension 0 (overworld) while populating chunk [x±1, y±1], causing cascading worldgen lag. Please report this to the mod's issue tracker"
More info: https://www.reddit.com/r/feedthebeast/comments/5x0twz/investigating_extreme_worldgen_lag/

Duplicate of Issue #50

I'm still working on a fix for this. I thought I fixed it in the dev version(0.7.7) but it's still happening. I understand the nature of the problem it's just taking a while to get all of the little generation things to behave.

Should be fixed now. Issues like this are a constant battle.