Attack Cooldown Sync

fixes the noticable desync of your attack cooldown when swapping items (especially obvious on high ping)

4.1K Downloads

fabricutility

About this Mod

Fixes the noticable desync of your attack cooldown when swapping items.
When swapping items, your attack speed is not updated until the server sends the packet to change your attributes.
This mod predicts the attack speed and sets it once you swap items to make up for the delay between server and client.

Available Versions

Attack Cooldown Sync 2.0release

MC 26.1.2fabric

June 16, 2026

Attack Cooldown Sync 2.0release

MC 1.20.4fabric

June 16, 2026

Attack Cooldown Sync 1.0-1.21.8release

MC 1.21.8fabric

July 30, 2025

Attack Cooldown Sync 1.0-1.21.4release

MC 1.21.4fabric

July 30, 2025

Attack Cooldown Sync 1.0-1.21.1release

MC 1.21.1fabric

July 30, 2025

How to Install Attack Cooldown Sync on Your Server

Order Server

Order a Minecraft Java server with at least 3 GB RAM (4 GB recommended).

Set fabric Loader

In the panel under "Egg", select the fabric loader and matching Minecraft version (26.1.2).

Install Mod

Open the mod browser in the dashboard and search for "Attack Cooldown Sync". Click "Install" – done! Alternatively, upload the .jar via SFTP to the /mods folder.

Compatibility

Mod Loaders

fabric

Minecraft Versions

26.1.2, 1.21.8, 1.21.4 (+2 more)

Server-side

✗ Unsupported

Recommended RAM

4 GB(min. 3 GB)

Frequently Asked Questions

Attack Cooldown Sync server crashes on startup – what to do?

Most common cause: wrong fabric version or insufficient RAM. Check the server log (latest.log) for "OutOfMemoryError" or "Mixin" errors. With Mado Hosting: ensure at least 3 GB RAM is allocated and the loader matches the mod version (26.1.2). You can switch loaders with one click in the panel.

Is Attack Cooldown Sync compatible with fabric?

Attack Cooldown Sync officially supports fabric for Minecraft 26.1.2, 1.21.8, 1.21.4. The Mado dashboard automatically detects incompatible loader combinations.

Server lagging with Attack Cooldown Sync – how to optimize performance?

Recommended RAM: 4 GB (per 8 players). Use /spark profiler to check if Attack Cooldown Sync consumes the most tick time. Common fixes: reduce server view-distance to 8-10, install "performant" or "starlight" as supplementary mods on Forge. With Mado Hosting, your server runs on NVMe SSDs with dedicated CPU cores for minimal latency.