Fabric hosting with short restarts and mods in place of plugins

The Fabric loader is thin on purpose: it reads each mod fabric.mod.json, resolves dependencies and applies the mixins, with no heavy bytecode transformation step before the world loads.

The effect shows up in your schedule, not in the TPS graph. When restarting costs little, updating a mod version stops being a job for the small hours: you warn the chat, stop, swap the jar and come back up before the community gives up waiting. When it costs minutes, the fix waits for the next window.

The list going around the forums is not a pile of generically fast mods. Installing all of them at once, without knowing which one hurts on your server, gets in the way of the diagnosis later.

Lithium rewrites tick logic, meaning mob AI, pathfinding and redstone, without changing game behaviour. Krypton lowers the per packet cost on the network layer, which weighs more the more people are online. FerriteCore cuts memory by deduplicating blockstates. C2ME parallelizes chunk generation and reading, the classic bottleneck of a new world.

Order matters more than the list: run spark, see whether the time goes into entity ticking, chunk generation or garbage collection, and only then choose. A chunk optimizer on a server stalled by a mob farm changes nothing.

Fabric does not implement the Bukkit API. EssentialsX, Vault and PlaceholderAPI are not incompatible with the version, they simply have nowhere to plug in, and the jar sitting in mods/ does not even raise an explanatory error. LuckPerms and WorldEdit survive because they publish their own build for the loader. Everything else becomes a separate mod, each with its own file under config/.

Hybrid layers expose the Bukkit API on top of Fabric, work in the demo and break in the corners: a plugin that touches NBT or packets finds the edge of the emulation. If you depend on ten plugins, the honest answer is to stay on Paper.

A mod that adds a block, an item or a dimension has to be on both sides, and anyone who did not install it is refused at the handshake. A mod that only optimizes the server asks nothing of the client, the case of Lithium, Krypton, FerriteCore and spark itself.

Out of that comes an underexplored design: a Fabric server carrying only optimization and administration mods, with the community joining on plain vanilla Minecraft, no install tutorial needed.