Dupes count vs FPS

as you could see from my save in one of my threads i had difficulties with fps while having 48 dupes till now. i was thinking that it was because of the working machinery animation, calculating the flow of the gas and liquids. but i decided to kill my dupes one by one, so I can tell that the fps drop is very significant no matter the pc specs when dupe count is above15. 15 dupes is max for a comfortable, by fps, gameplay, so it makes me think that the main reason of the fps drop is the dupes pathing/working/hanging around calculations. So yeah, sadly, this game cannot be played for mass colony management yet, if ever.