Although my base is quite large (I am using many mods, including the Planetaries mod), most of the bases are idle, and I have experienced a clear drop in FPS/UPS after the 0.8.
Here are my save file.
https://drive.google.com/drive/folders/17BP_5yt5HxjXt6wLQEVUzdNVEUdMbRxu?usp=drive_link
Thanks for your support :D
The maximum when you first load a game is going to be quite large as it instantiates all of the mechanics in one frame but after the first update the values that should go way down, so if it is staying that high there is probably something not working right. The average should not be that nearly high, either.
Is your base extremely large? What other mods are you using?
If you're willing to share your save I can look more into this.