As noted before, the bottleneck for performance was the flightpaths of the ships. When the player zoomed in the engine tried to draw a set amount of dashes squeezed together sending the math haywire.
I've now adapted the dash amounts to your zoom level and in my own tests this runs several times better.
Here I'm spawning 1000 miners
Here are another 500 traders
Hopefully this brings us 90% there :)!
Let's enjoy the last days of Next Fest!