Unfortunately, when i play on the highest difficulty, my fps goes down to about 2-3(!) fps when i enter maps with a lot of huge ships, even when i havn't started to fight anyone in the sector - just by beeing there.
It's of course not your fault that i'm playing on an upgraded toaster, but this bought me an idea on how to drastically improve fps:
just turn the red dots on the minimap into just that: red dots!
...and only begin simulating the ships when the player gets into scanner range. they don't do anything else anyways while not aggroed - they wander around near their starting position, and thats it. an actual red dot could do the same.
I'd guess thats easy to implement, and would allow budgetgamers like myself to play the game a bit more challenging 🙂