This performance issue seems to be resolved in 2.1.10. Thanks.

Rseding91 wrote: Wed Jul 01, 2026 3:02 pm Could you upload the save file you're using for that example

Sure, here it is.

I want to confirm this issue. I see a massive performance degradation from 2.0 to 2.1.7 and 2.1.8. It's noticeable on Vulcanus, other surfaces seem minimally or not affected.
Tested on the Steam version of the game.

System configuration
OS: Fedora Linux 44 (Workstation Edition) x86_64
Kernel: Linux ...