our trains fixed in 1.0 huge performance hit when enough are moving crashing a junction with blocks to put issues from moving too slow so I don't know, these specific things I don't know but we have spent a significant time working on trains, optimizing and also fixing some of the issues books that existed for trains they're not going to be perfect for 1.0, because we have limited amount of time but, they've seen some improvement I think but can never never polish enough