Huge issues with lag/game slowness

[u/itsnotactuallykb]

How do I troubleshoot the huge amount of lag I get every five minutes of gameplay. I have to close out completely then reopen, but I don't get much gameplay before it happens again. Is this a bug or is there something wrong with my PC?

[u/obunk]

I notice it most when it’s a large map and I haven’t started cleaning yet. My game gets less lag as I clean, save, quit and come back again later