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Easy Server Optimizer(ESO)

by _dynobot

Easy Server Optimizer, published as ESO, is a server-side mod that monitors server TPS and applies optimization rules in real time on Forge and NeoForge.

ForgeNeoForgeServer-side onlyAll rights reserved1.18.2 – 1.21.8

What it does

Once installed on a dedicated server, ESO watches the server tick rate and adjusts its optimizations as performance changes. At normal TPS it applies gentle scaling; with a minor drop it scales rendering and simulation distances; with a severe drop it applies stronger rules; and at an extreme drop it activates emergency safeguards, including a temporary pause of the weather and daylight cycle. Its entity limiting caps mobs per chunk and clears projectile debris such as arrows and tridents before they pile up and cause lag.

The mod is required only on the server. Players joining a dedicated server or a multiplayer world hosted by someone else need nothing installed. A host who runs a singleplayer world with Open to LAN can gain the optimizations for anyone who joins, and the manual opt commands are available for tuning but are never required; the adaptive mode turns itself off when those commands are used. ESO is built on a zero-dependency library, so it needs no other mod. It is published for Forge and NeoForge across the 1.18.2 – 1.21.8 range, with builds for 1.18.2, 1.20.1, 1.21.1 and 1.21.8, under All rights reserved.

Key features

  1. Adaptive TPS optimization

    The mod reads server TPS continuously and changes its optimization level to match, without a restart.

  2. Entity mob limiter

    Mobs are capped per chunk, and projectile entities are removed automatically before they accumulate.

  3. Item cleanup timing

    Lifespans are set per item type, so dropped items despawn on a schedule instead of causing tick spikes.

  4. Distance control in singleplayer

    In singleplayer, render distance is set through the client's Video Settings rather than by the mod.

Compatibility

Latest build for each game version and loader.

1.21.81.07Not available
1.21.1Not available1.094
1.20.11.094Not available
1.18.21.094Not available
ReleaseBetaAlphaNot available

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

Questions

Does ESO need other mods installed?

No. ESO is built on a zero-dependency library and runs without any other mod on Forge or NeoForge.

Do players need ESO on their own game?

No. Server owners install it, and players connect with no copy of their own.

Which versions does ESO support?

Builds exist for 1.18.2, 1.20.1, 1.21.1 and 1.21.8, and the latest Forge file is 1.094 for 1.18.2, while the latest NeoForge file is 1.094 for 1.21.1.

In the catalog

Easy Server Optimizer(ESO) is one of 3,545 Optimization mods on ModsFinder, and one of 1,441 Optimization mods for Forge. 17,695 mods support Minecraft 1.21.8.

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What the author says

🛡️ Server-side Only: Required only on the server (dedicated server or the host of a multiplayer world). Clients joining someone else's server do not need to install it — but if you're the host (singleplayer, or "Open to LAN"), you're actually running the server yourself, so installing it there gives you the full…
_dynobot, on the Modrinth page

Official listing

Owner
_dynobot
Published
2025-09-08
Updated on Modrinth
2026-08-23
Facts verified
2026-10-15

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