Sorry wrong topic, can someone change this to Minecraft? Thank you and sorry!
@Tomaž Vöröš After playing the world in the version before, I changed to pre-release, and it still lagged. It may be bound only from worlds that had this bug. Btw, haven't tried what @Galaxy_2Alex said, I just copy-pasted my work in another world 😛
Fixed in 1.8-pre1, but old worlds that had this bug still contain this bug. 🙂
I really hope this gets fixed in 1.8. Dinnerbone said 14w34d may be the last snapshot.
I think I found the problem: it only "lags" with the gamerule doMobSpawning set to true. Try to set it to false and it should fix the problem 🙂 Worked for me!
Fixed in 1.18.10.24 Beta