I would usually pregen my world 5k blocks from 0 0 overnight and it would finish around 3 in the morning. I just added better caves and better mineshafts and regenerated the terrain. Got up this morning and it hasn't even finished 100k chunks out of 430k. My CPU is running 94% - 100% changing every couple seconds back and forth. Any ideas of how to make this run well? If its just too big I may need to decide whether I want to wait a couple days each time or remove this mod and just use Minecraft's boring caves. Also, stupid question probably, but, is this mod server sided or needed on both server and client?

Solved: I had given the server 8gb of RAM, I have like 24 or something like that, but usually I am playing Minecraft with the server running and stuff like that. This means I have 8 for minecraft and 8 for the server, and another 8 so I don't crash the computer by running another app or youtube or something... Because I am just generating right now, I gave it 16 and now its using 12 and the CPU is at 15 - 25 ish, varying. It appears I just need more Ram given to it for at least the pregen stage if not just in general.