Yeah I noticed this in .1783, I went from 250+ FPS to 1 when I teleported to a planet. In .179 it seems fine but now my main universe wont start.I guess something went wrong with the multi-threading in the later dev builds. Because it's like I said, the first dev builds had planets loaded within seconds, with no noticeable lag (except for the normal constant frame drop). But now my fps drops to 3, the game freezes constantly and the only way to not make it lag is by not looking at the planet, flying away or landing on it. Neither of which you want to do when you feel like flying by.