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Resources / Mods / Delay Optimizer

Delay Optimizer

Zero delay. Absolutely no delay. Delay Optimizer completely eliminates every bit of action and input delay—giving you instant, seamless responsiveness on any…

ModsFree1.21
by gsd · listed from Modrinth
Download › Install with the launcher

Opens Modrinth · 78 downloads there

What it does

Zero delay. Absolutely no delay. Delay Optimizer completely eliminates every bit of action and input delay—giving you instant, seamless responsiveness on any…

Delay Optimizer is a resource made by gsd. It supports Minecraft 1.21. It has been downloaded 78 times on Modrinth. The last update came out on Oct 17, 2026.

Supported versions

1.21

Release history

The newest is 1.0.0, released on Oct 17, 2026. It is made for Minecraft 1.21.11. It runs on Fabric. The download is 41 KB.

VersionReleasedMinecraftType
1.0.0Oct 17, 20261.21.11Release
Description from the author on Modrinth

Delay Optimizer

Delay Optimizer is a client-side Fabric mod designed to improve input responsiveness and reduce perceived action latency during competitive PvP and movement.

By leveraging client-side prediction and optimized packet flushing, it provides smoother, more responsive feedback for common game actions.


✨ Features & Technical Details

  • Food Responsiveness (Client-Side Prediction):
  • Predicts food and Golden Apple consumption on the client thread upon completion of the eating animation.
  • Instantly displays client-side visual absorption hearts and regeneration feedback while awaiting server confirmation.
  • Streamlined Projectile Throws:
  • Optimizes packet handling for Ender Pearls, Wind Charges, and Splash Potions by flushing the Netty network channel immediately upon use.
  • Prevents visual desync and ghost pearl artifacts by synchronizing client swing animations and cooldowns without spawning conflicting dummy entities.
  • Firework Acceleration:
  • Dispatches Elytra rocket acceleration packets immediately to reduce input lag during flight.
  • Customizable Timing Slider (0ms - 200ms):
  • Allows players to fine-tune the prediction delay offset to best match their network conditions and server tick rates.
  • In-Game Configuration GUI:
  • Accessible via Mod Menu, featuring a master toggle to instantly enable or pause all optimizations.

⚙️ Compatibility

  • Mod Loader: Fabric
  • Minecraft Versions: 1.20.1 & 1.21.11+
  • Side: 100% Client-Side

Written by gsd. Read it with pictures on Modrinth.

How to install Delay Optimizer

  1. This mod runs only on your own game. Servers do not need it, so you can use it on any server.

  2. Install Fabric for Minecraft 1.21.

  3. Download the .jar file from Modrinth and put it in the mods folder of your .minecraft directory.

  4. Start Minecraft with the Fabric profile.

  5. With the CraftRank Launcher you can skip these steps: open Mods, search for Delay Optimizer and click Install.

Compatibility

Minecraft versions
1.21
Runs on
Fabric
Where it runs
Client only (your game)
Edition
Java
Needs
Nothing else
License
MIT
Price
Free
Upkeep
Actively updated (Nov 9, 2026)

Delay Optimizer compared with similar ones Compare all alternatives

ResourceDownloadsVersionsLast updatePrice
Delay Optimizerthe one you looked at781.2124 days agoFree
LinxfaX's Crystal OptimizerLinxfaX951.19 – 1.21Aug 22, 2026Free
Not Enough Recipe BookSSKirillSS8.7M1.18 – 26.x2 days agoFree
Marlow's Crystal OptimizerDevBram5.3M1.19 – 26.xOct 7, 2026Free

Questions

Does Delay Optimizer work on Minecraft 26.x?

Not yet. The newest version it supports is Minecraft 1.21.

Is Delay Optimizer free?

Yes. Delay Optimizer is free to download from Modrinth.

Is Delay Optimizer client-side or server-side?

Client-side. Delay Optimizer goes in your own mods folder and works on any server, including servers without mods.

Is Delay Optimizer still updated?

Yes. The last update came out in the past day.

What are the best alternatives to Delay Optimizer?

The closest ones are LinxfaX's Crystal Optimizer, Not Enough Recipe Book and Marlow's Crystal Optimizer. Compare all alternatives

Alternatives to Delay Optimizer

Particle CoreMods · 1.20 – 26.x

Particle optimizations: Culling, rendering optimizations, configurable particle-type-specific spawn reduction, and potion particle disabling. Compatible with…

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