Moonrise is a Fabric/NeoForge mod for optimising performance of the integrated (singleplayer/LAN) and dedicated server. Effectively all of Moonrise's changes are included in Paper, except those from Paper that intentionally change gameplay.
Moonrise can run on either the client or server, but primarily benefits the server.
Moonrise aims to optimise the game without changing Vanilla behaviour. If you use Moonrise on the client, most of the affected areas only affect the integrated server or small of the client tick. This means that improvements client side would behave similar to Lithium.
These changes result in measurably lower tick times on servers, and they improve chunk loading/generation.
Please see Github for known incompatibilities.
Moonrise provides documented configuration options (the config itself contains the documentation) for tuning the chunk system and enabling bugfixes in the config file $mcdir$/config/moonrise.yml.
Important configuration options may be configured from the mods menu as well.