JS Performance Core

Name: JS Performance Core
Price: 8 EUR
Author: HenryMMey

A lightweight, optimized performance modpack. Maximum FPS, minimum footprint. No fluff, just speed.

by HenryMMey

78 Downloads

0 Followers

fabricMC 1.21.11lightweightoptimization

Rent JS Performance Core Server

Screenshots

About this Modpack

JS Performance Core

This modpack aims to make Minecraft playable again on "potato" computers. It contains only the bare minimum required for performance. Because of this, you won't find mods like Iris here. If you are looking for "Quality of Life" modpacks, I don't have any yet—but they are coming soon!

Features

Maximum Optimization: Built on the latest Fabric loader with essential mods like Sodium, Lithium, and FerriteCore.
Smart Culling: Aggressive culling of hidden objects and particles to save GPU resources.
Vanilla-Friendly: No gameplay changes. It’s the Minecraft you know, just much faster.
Lean & Clean: No Iris or shaders are included by default to keep the pack as lightweight as possible.

FPS

System

My PC is running Windows 11 with an RTX 3060 and a Ryzen 3600 processor. The Minecraft instance has 4GB of allocated RAM.

FPS

On my PC, I got an average of 600 to 700 FPS, with a minimum of 480 FPS and a maximum of 950 FPS.

Connect

Feel free to join my Discord if you need help or just want to hang out with the community.

JS Gaming is part of HMLabs.

Available Versions

JS Performance Core 1.21.11-1.1.0beta

MC 1.21.11fabric44 downloads

March 7, 2026

JS Performance Core 1.21.11-1.0.0beta

MC 1.21.11fabric34 downloads

January 1, 2026

How to Set Up a JS Performance Core Server

Order Server

Choose at least 4 GB RAM (6 GB recommended for JS Performance Core). Based on player count: per 8 players.

Install Modpack in Dashboard

Open the modpack browser in the dashboard, search for "JS Performance Core" and click "Install". The fabric loader and Minecraft 1.21.11 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

JS Performance Core 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 6 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 JS Performance Core server really need?

Minimum 4 GB, recommended 6 GB for stable performance. per 8 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 €8/month).

Can I add custom mods to JS Performance Core without conflicts?

Yes, but check compatibility: only use mods for the same loader (fabric) and same Minecraft version (1.21.11). 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.

JS Performance Core server lagging – performance tips

1) Increase RAM to 6 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.