📦 Optimization Modpack — Fabric 1.21.9 / 1.21.10

A performance-focused Fabric modpack designed to drastically improve FPS, reduce stutter, optimize world simulation, and enhance the overall gameplay experience — all while preserving full vanilla behaviour.

⚡ Core Performance Mods Sodium

A powerful rendering overhaul that massively boosts FPS and reduces frame-time spikes by improving how Minecraft draws the world.

Lithium

Optimizes many parts of the game’s logic such as AI, physics, block updates, and ticking systems. Offers major CPU-side performance improvements without changing gameplay.

VMP (Very Many Players)

Optimizes networking and chunk systems, improving performance on worlds with many entities, chunks, or complex interactions.

Alternate Current

A major improvement to redstone performance with an efficient simulation engine that avoids unnecessary updates while keeping full redstone compatibility.

🧱 Rendering & Visual Optimization EntityCulling

Uses asynchronous visibility checks to avoid rendering entities and block entities you can’t see, drastically reducing GPU usage.

MoreCulling

Expands vanilla and Sodium culling to remove additional unnecessary rendering, improving performance in structures, foliage, and tile-heavy areas.

ImmediatelyFast

Optimizes immediate-mode rendering paths to reduce CPU overhead and improve frame stability.

Iris Provides shader support while staying fully compatible with Sodium, allowing high-performance shader usage.

🧠 World & Memory Optimization FerriteCore

Significantly reduces memory usage by optimizing how Minecraft handles block/entity data structures.

Noisium

Optimizes the game's noise generation system for faster worldgen and smoother chunk loading.

LetMeDespawn

Improves despawn logic so unneeded mobs are removed more efficiently, reducing lag in mob-heavy areas.

ServerCore

A collection of optimizations that improve performance in the integrated server (singleplayer)

Almanac

Enhances certain game systems and world mechanics with optimized behaviour.

🔧 Configuration & Utility Mod Menu

Adds a simple menu to view and configure installed mods directly from the main menu.

Cloth Config API

Provides the configuration framework used by many mods in this pack.

Configurable

Allows fine-tuning of various mod settings for a more optimized gameplay experience.

Neruina

Provides extra tools and helpers for mod configuration and performance-related adjustments.

Not Enough Crashes

Improves crash reporting with clearer logs and allows clean recovery to the main menu.

Reese’s Sodium Options

Replaces Sodium’s options UI with a cleaner, more organized menu and better navigation.

Substrate

A shared library required by some performance mods.

Async (Alpha)

Experimental mod that parallelizes certain entity tasks and server operations for improved TPS on CPU-heavy worlds.

🧩 Additional Optimizations BadOptimizations

A set of safe optimizations for rendering and internal systems with minimal compatibility issues.

bbe (Better Block Entities)

Optimizes the rendering of block entities like chests, signs, and banners for better FPS.