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NoEntityLag

by xXduckyXx1

NoEntityLag is a Fabric server mod that pauses redstone and non-player entity activity in chunks that exceed configurable performance thresholds.

FabricServer-side onlyMIT License1.21.10

What it does

When a chunk passes the limits set in its JSON configuration, NoEntityLag reacts in two ways. Non-player redstone updates in that chunk are frozen for 20 seconds, and non-player entities there stop processing for a cooldown period. Once the cooldown ends, normal operation resumes without any manual step from the server owner.

The mod is aimed at server owners who see lag from entity-based or redstone machines, the kind of contraption that can overwhelm a server. Its stated purpose is performance protection, with the author describing it as a way to stop lag machines from overloading a server. Only non-player entities and redstone are affected, so player movement and gameplay stay smooth.

NoEntityLag is server-side only, so only the server needs it and players join without installing anything. It is published for Fabric and 1.21.10 only, with 1.0.1 as the latest file, released under the MIT License. The code is not open source.

Key features

  1. Smart redstone limiting

    Detects redstone contraptions that stop a chunk from running smoothly and pauses their non-player updates.

  2. Entity overload protection

    Keeps entity-based lag machines from overwhelming the server by halting non-player entities in overloaded chunks.

  3. Configurable limits

    Thresholds are set through a simple JSON configuration, so owners can tune how strict the protection is.

  4. Silent operation

    Intervention happens without alerts to players, so the server keeps running without visible interruptions.

Compatibility

Latest build for each game version and loader.

1.21.101.0.1
ReleaseBetaAlphaNot available

Only full game releases are shown. This mod publishes no snapshot builds.

Use cases

Public survival servers

Community servers can use the limits to protect the world against griefers who build lag machines.

Minigame networks

Networks that run several game modes can keep one lag-heavy contraption from slowing every mode.

Who it’s for: Server owners running Fabric who want automatic protection against entity and redstone lag, with no installation needed on the client.

Questions

Do players need NoEntityLag installed?

No. The mod is server-side only, so clients do not need to install anything to join a server that runs it.

Which loader and game version does NoEntityLag support?

It is published for Fabric only, for Minecraft 1.21.10 only. The latest file is 1.0.1, released 2026-01-17.

How are the limits changed?

Performance thresholds are customized through a simple JSON configuration file in the config folder, after installing Fabric API in the mods folder.

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What the author says

⚡ NoEntityLag | Minecraft 1.21.10 Stop lag machines before they crash your server! 🚫 ✨ Features 🔴 Smart Redstone Limiting: Automatically detects and stops laggy redstone contraptions
xXduckyXx1, on the Modrinth page

Official listing

Owner
xXduckyXx1
Published
2026-01-17
Updated on Modrinth
2026-01-17
Facts verified
2026-10-15
Open on ModrinthCompare