EVOC

EVOC is a mod by ProfMobius. It requires the MobiusCore library to launch. EVOC stands for Extreme Vanilla Optimization Collection or Code. This mod aims to add server-side optimization to some Vanilla TileEntities. These TileEntities include the Hopper, the Furnace, and the Monster Spawner. All three of these machines tend to lag server tick-rate if used in mass.

Note that this mod is not compatible with MCPC+.