Rimworld Technical Question: Out-of-Colony CPU

[CannibarRechter]

So, this is a rather detailed question about the game engine:

What calculations occur offscreen in Rimworld?

I've become curious, as we know that off-screen pawns seem to have wounds process, age, and die. So I'm wondering how many offscreen pawns are modeled, what governs the total count of offscreen pawns, and so on?

(I posted this  under mod help mostly because I thought it was more technical than "general").

[skullywag]

For one they are called "world pawns" so youll find them referenced as such on the code i guess. ILSpy (or other decompilers) may help you find what they do.

[CannibarRechter]

I guess the reason I am asking is that I've noticed that in the late game, the game slows down, even after I start building, adding pawns, or adding animals. So I am wondering if there is something happening not in the colony that slows the game down, and if there are things in the XML which may have an impact on this.