So im having long loading time for multiple welded-parts(not multi-welded parts) existing within the same craft . I have one 100-part-weld as structural backbone for my spaceplane, one 100-part-weld as structural backbone for my space ship. When I load them individually they take like 4 secs to load. When I load both within physics range as 2 separate crafts, it takes like 10 secs to load them. Makes sense, and acceptable. But then when I load them as they are docked they take like 5 minutes to load. 5 minutes. I did an experiment with only the two parts made into one craft. Same thing happens. Then I tried building crafts made of two welded-parts, this time the plane/ship-weld with a random 3-part-weld. It took a lot shorter, like 5 secs. Heres the question, I dont understand what caused the exponential increase in loading time.