Crew FPS Tweaks
This mod may significantly reduce lag when doing stuff like trading and resource gathering.
This mod works by disabling the thruster graphics the crew have when flying in space. During testing I found the lag reduction to be significant (went from 4 fps without this mod to around 12 to 14 fps with this mod in my testing environment (which happens to be the pic of all the crew flying)).
It may look a little bit more boring this way but it works :).
Also if you don’t like this mod, it can be freely enabled and disabled so you can test for yourself the difference.
If you prefer a version that doesn’t remove the crew thruster fx but only simplifies them for a smaller performance gain, you can try this version instead: https://steamcommunity.com/sharedfiles/filedetails/?id=3359770864