[2023] MOVED: These days I had a problem where only in one of my worlds the FPS went down from 40+ to 3-4 after day 77

The first thing I would do is open the console with F1 and see if there are any errors (in red text) or if a message is spamming the console many times a second. If the slowdown only occurs in some areas, it could be a drone that’s fouled up. “le” in the console will list entities so you can check. If there is a drone listed, you can enter “jd clear” to remove it. There are no doubt other things that could cause a performance drop in the middle of a game, but this is one thing that’s been coming up in the current stable release.