What happened to the optimization in the last pre-release ?! System Windows 7, 1 gigabyte RAM, 4-core processor (these are hosting parameters). The server is played simultaneously by 1 to 7 players with a limit of 25, large biomes. And even with such a meager load, the server manages to lags CONSTANTLY! Mobs moving jerks, the extracted blocks return to the place, the doors do not open completely ... And this is for everyone who is on the server! Even in the 5th pre-release there was not such, although the host parameters were the same. MAKE SOMETHING WITH OPTIMIZATION!