Extreme lag in ultra dense space stations

[Hiztaar]

Here is the situation.

In order to make a very compact yet nice and efficient station, I've user the ability to fit modules through each others in order to get a good result.

But the thing is that the space traffic keeps spawning and there are thousands and thousands of little speeders flying creating a tremendous level of lag, even when not "seeing" the traffic directly.

Is there a way to decrease or limit stations space traffic animations ?