I've recently downloaded Observable to see a visual display of what blocks and stuff are causing a lot of lag, because whenever i went near my mob farm, the TPS absolutely TANKED. so, I was flying around with spectator and to my suprise, I found this;

https://www.reddit.com/r/feedthebeast/comments/1jdo5wt/oretoises_are_so_laggy_what_the_hell/?utm_source=share&utm_medium=web3x&utm_name=web3xcss&utm_term=1&utm_content=share_button

This reddit post contains an image of one of the turtles I found under my farm, of which there were dozens. if you can't tell, 70+ lag value is OBSCENE compared to the normal 0 - 1 caused by most functional blocks, even those from the Create mod. Heck, my Arts Nouveau Weald walkers are only making 40 each, meanwhile there's hundreds of turtles putting out 70-100s all over the place

I don't want to have to disable the Mobs module because it'll delete my nether dog :( but currently that area is unuseable. I think the only reason I haven't been getting many crashes from the turtles while in my base is because it's above water and there's not a lot of caves under it