Lagless: FPS Optimizer

LaglessMod is an optimization mod for Minecraft 1.20.1 that boosts FPS and reduces lag on low-end PCs by adjusting rendering, entities, particles, and game calculations.
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laglessmod-1.0.0.jar

File namelaglessmod-1.0.0.jar
Uploader
RyoSukunaRyoSukuna
Uploaded
Jan 20, 2026
Downloads
236
Size
17.3 KB
Mod Loaders
Forge
File ID
7495737
Type
R
Release
Supported game versions
  • 1.20.1

Curse Maven Snippet

Forge

implementation fg.deobf("curse.maven:lagless-1438799:7495737")

Learn more about Curse Maven

What's new

LaglessMod Changelog

Initial Release

Welcome to the first release of LaglessMod! This mod was built from scratch to optimize logic and rendering for low-end PCs.

🚀 New Features

Performance Profiles: Added a native button in the Video Settings menu to switch modes in real-time.

🔴 SUPER FAST (Potato Mode): Enables aggressive Vertical Culling (stops rendering blocks deep below the player) paired with Dynamic Fog to hide visual cutoffs.

Benchmark Result: +100 FPS boost while mining/exploring.

🟡 BALANCED: Standard optimization. Smart culling for entities and particles that are far away or hidden.

🔵 VANILLA: Disables optimizations.

🛠️ Core Optimizations

Vertical Culling Logic: Implemented a system that stops the game from drawing caves and blocks 16 blocks below the player (Super Fast Mode only).

Dynamic Fog System: Added smart fog that adapts based on player camera pitch—hides the void when looking down, clears up when looking at the horizon.

Smart Entity Culling: Mobs outside the effective range or hidden from view are no longer rendered.

Particle Engine Fix: Heavy particles (explosions, rain, redstone) are deleted if they are too far from the player to save CPU.

Fast Math: Replaced vanilla trigonometry (Sin/Cos) with ultra-fast pre-calculated tables.

Memory Manager: Added an automatic RAM cleaner that runs every 5 minutes to prevent long freeze spikes.

🐛 Credits

Developed by Ryosukuna.

Target: Minecraft 1.20.1 (Forge).

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