Im getting that issue also. Trying to work out whether its because i made the base in a forest area compared to on the beach with my first base or whether its the mod itself, both bases are about equal size. The main difference is the first is made from steampunk blocks and has about 20 dinos parked there yet it barely lags at all, this new one is same size with no dinos just more trees which we are slowly clearing out but whenever the wife is nearby we both lag quite considerably.

I havent figured it out yet ..... Tested the size, Less pieces so id assume less drag from the game but when looking at certain pieces I drop in FPS badly, I turn away & they go back up even if the pieces are in view still...

We're having the same issue on our server. Made a base with this mod and as soon as somebody else enters the building, fps drops to 15 or 20. We're on the map Ragnarok and are using the Gaia mod as well. As for hardware, I have an Intel I7-8700, 32Gb and GeForce 1080 Ti. So my hardware shouldn't be giving any issues. I see that this mod hasn't been updating for a while.

any solutions on this? I have been having the same issue across my clusters and cant figure out what to do about it except removing the mod or just not using CKF floors/foundations.

As a modder myself I can answer this: The issue you are experiencing is due to how high rez the mesh's and textures are for all the structures. With games the lower the poly count you can manage on a model and the more optimize a texture can be the better FPS you will have.

This mod uses high poly count/ high rex textures for its structures + all the extra textures you can switch them too are loaded in as well. This causes a lot of lag when making mid to big builds. The mod may look good in game, but it’s doing it at the cost of performance.