I am getting around 8 to 15 fps most of the time, i've tried every bit of advice i could find online, including reducing the amount of dwarfs (going down to around 140ish dwarfs gave minimal improvements)

Im using fast dwarf and time stream to compensate.

Reducing farms helped initially but regardless of whatever performance saving measure i try, the fps always goes back down to 8 to 15 fps.

I've been building to try and reduce line of sight checks, i have tried exterminate/making sure there arent path finding issues or a large amount of hidden mobs, tried different software rendering etc etc.

It seems to be specifically a cpu issue where something occurring is making the cpu max out.

I have multi threading enabled.

Thank you for any assistance you can give.