Performance Mods

Fabric API - Required for most mods to function in Fabric

FerriteCore - Reduces RAM usage.

Krypton - Optimizes network stack.

Lithium - Game optimizations that don't effect vanilla gameplay.

MemoryLeakFix - Fixes a couple memory leaks. Can also run clientside.

Servercore - Very configurable to reduce lag spikes. Set your alterations carefully, to not effect vanilla gameplay.

Starlight - Rewrites the Minecraft lighting engine

TimeOutOut - Allows for configurable player timeouts. Useful for people with slower connections.