ClientOptimizer

Name: ClientOptimizer
Price: 12 EUR
Author: gavrilo5gasa

As the name it self says Client Optimizer is trying to optimize the client in many ways, that it may not look like vanilla Minecraft anymore, but are vanilla

by gavrilo5gasa

164 Downloads

0 Followers

fabricMC 1.21.4multiplayeroptimizationtechnology

Rent ClientOptimizer Server

About this Modpack

ClientOptimizer modpack aims to make the gameplay a lot better by giving YOU the power to optimize YOUR gameplay how you like and want, but at the same time keep it vanilla like. It is also there to make building a litle bit eazier, because it adds a lot of Mods like Axiom and Armor Statues.

Every version of ClientOptimizer has it's own unique features, so you can choose what mod-pack you like the most.

Warnings & known bugs

Before starting you might need to change your keybinds
In the version 3.0.0 your game might chrash by opening your inventory (Happend to me like 5 times But it is sooo random that I don't even know if it's a bug or a server problem)
In the version 3.0.0, when you download it it will say 4.0.0 Idk why but yeah :/

Available Versions

ClientOptimizer 3.0.0release

MC 1.21.4fabric63 downloads

October 25, 2025

ClientOptimizer 2.0.0release

MC 1.21.4fabric71 downloads

June 14, 2025

ClientOptimizer 1.0.0release

MC 1.21.4fabric27 downloads

June 4, 2025

How to Set Up a ClientOptimizer Server

Order Server

Choose at least 6 GB RAM (8 GB recommended for ClientOptimizer). Based on player count: per 5 players.

Install Modpack in Dashboard

Open the modpack browser in the dashboard, search for "ClientOptimizer" and click "Install". The fabric loader and Minecraft 1.21.4 are configured automatically.

Start Server & Play

Start the server – all mods are loaded automatically. Share the server IP with friends and play together!

Frequently Asked Questions

ClientOptimizer server crashes or won't start – what to do?

Most common causes: insufficient RAM or wrong fabric loader. Check latest.log for "OutOfMemoryError" → increase RAM to at least 8 GB. For "Mixin" or "ClassNotFoundException" errors: modpack version and loader don't match. With Mado Hosting, loader and Minecraft version are auto-configured on modpack install – preventing most startup issues.

How much RAM does a ClientOptimizer server really need?

Minimum 6 GB, recommended 8 GB for stable performance. per 5 players. Important: Minecraft modpacks need more RAM than vanilla – plan extra per additional player. With Mado Hosting, you can scale RAM up live at any time without data loss (from €12/month).

Can I add custom mods to ClientOptimizer without conflicts?

Yes, but check compatibility: only use mods for the same loader (fabric) and same Minecraft version (1.21.4). Common issues: ID conflicts with recipe mods and incompatible coremod versions. The Mado dashboard mod browser only shows compatible mods and warns about known conflicts.

ClientOptimizer server lagging – performance tips

1) Increase RAM to 8 GB+. 2) Reduce server view-distance to 8 (server.properties). 3) Pre-generate chunks with the "Chunky" plugin. 4) Use /spark profiler to check which mods consume the most tick time. With Mado Hosting, all servers run on NVMe SSDs with dedicated CPU cores – eliminating hardware as a bottleneck.