@goblinsly2 Normally I would expect M28 to handle a 20km map with 5 AIs (absent mods), but checking the map I suspect the reason is the large number of cliffs - whenever an air unit flies over them M28 tries to figure out the closest land area to it, which results in a significant strain where there aren't any nearby (both requiring more CPU resources, and more memory usage).
The crash was ultimately due to exceeding the memory, while the stuttering early on was primarily caused by its logic for calculating the zones near a particular air unit.
I'm doubtful I'll be able to make a significant improvement to how M28 handles that map but will have a think if there's anything. Other suggestions which I would expect to help would include:
- Reducing the factions used (which should reduce memory usage)
- Using unit restrictions to ban all air units (which should improve both CPU performance and memory usage)
- Playing an edited version of the map that cuts out most of the unpathable cliffs on either side (this would only work for personal use though as you wouldn't be able to upload such a map to the vault without permission of the original author)
- Disabling other SIM mods (you had RNG and M27 also enabled - there's the possibility this could increase the memory or cpu usage)