So me and my friend are playing on a survival world thru Hamachi and it worked fine, we were having a lot of fun. Then we switched to 1.9 snapshots but we decided to go back to 1.8 because of bugs and then, everything was still fine. But one day my friend can't play at all because of the lag, but our Internet Connection and Hamachi is the same as before, and perfect. We went on a diffrent world to see if he would still lag and he does not. We did play quite a bit on our world and we don't want to do it again, but still we don't have a lot of things that could lag out, few item frames, ~50 cows in a farm, a mobgrinder with not an impressive amount of signs and a blaze exp farm... and a lot of grinding and mining went to this world. The 1 thing that worries me is that it started to lag so suddenly. Because of it we don't hav any energy to play :<

Edit 1: 0 redstone clocks because I know my thing about redstone, and a few hoppers