Minecraft wiki entry for Far_Lands, associated text: If the Far Lands are ported (see below), and the player has access to commands, the /gamerule doMobSpawning false command will stop mobs from spawning, and the /kill @e[type=!player,r=300] command can be used to remove excessive entities in the vicinity (use about 3 times per minute for greater efficiency; although it will kill any entity other than the players, including minecarts, paintings, potentially useful mobs etc.; 300 can be any desired distance), and /gamerule doEntityDrops false can disallow sand and gravel dropping as items (but mobs wouldn’t drop anything either) (sand and gravel will not cause excessive drops in Far Lands made to spawn closer). If not ported, use mods and/or multiplayer to get appropriate commands. Alternatively, if the terrain is ported, it can be possible to also perform the first command with the use of command blocks, along with a redstone clock. Also, if you are using Minecraft 1.9 or newer, you may use a command block on the “repeat” setting, along with toggling “always active”. Another option is to add lag reducing mods, like Optifine or Fastcraft.