Performance/FPS Mods for Minecraft Java
Browse 20,282 free Performance/FPS mods for Minecraft Java — popular picks include DarkTimer - RPG Clear Entity Lag, Exordium, Ixeris.
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DarkTimer - RPG Clear Entity Lag
RPG Style, Automatically clears and removes dropped items every 10 minutes to reduce server lag

Exordium
Render the GUI and screens at a lower framerate to speed up what's really important: the worldrendering.
Ixeris
Buffered raw input and threaded event polling
GPUTape
Fix VRAM leaks. Based on VideoTape.
Had Enough Items
Cleanroom's JEI fork for 1.12.2 with optimizations and more features

Mellow
Shaderpack with a painterly aesthetic made for people who want to actually play the game. It's easy on your eyes and on your computer!

Saturn
A performance mod designed to optimize Minecraft's memory usage.
Disconnect Packet Fix
Works around the MC-271325 bug on Fabric and NeoForge servers (fixes "error sending packet clientbound/minecraft:disconnect")

voxy
A Level of Detail rendering mod
Enhanced Block Entities Reforged (Unofficial)
Improves FPS with rendering block entities like chests

Better Clouds
Beautiful clouds in touch with the vanilla style

Pastel Shaders
An aesthetic, performant pastel-colored shaderpack with multiple color presets.

FeyTweaks
Mod for optimizing signs and beacons.

GPUBooster
Provides DSA & fastest math formulas to game render system for best perfomance! Compatible with Sodium/Embeddium, Iris and shaders.
No See, No Tick
Configurable performance mod that increases entity performance by stopping ticks based on distance
lazy-language-loader
lazy-language-loader improves loading times when changing your language by only reloading the language instead of all the game resources!
Clean F3
Removes useless information from the debug screen.

ModernFix-mVUS
A fork of ModernFix that adds minor version update support.
Magnesium
Unofficial Port of CaffeineMC's "Sodium" Mod From Fabric to Forge
Chibi
Make 1.12.2 great again.

VulkanMod
Vulkan renderer mod for Minecraft.
Fast Furnace for Fabric
Optimizations and tweaks for the vanilla furnaces
FastWorkbench Minus Replacement
FastWorkbench optimizations without the usage of registry replacement
[ESF] Entity Sound Features
Allows for entity sound variation using ETF / OptiFine format property rules. Also adds aditional sound related utility for ETF & EMF
XXVI's Shiny Armor Trims
Glowing Armor Trims (With Optifine or in Vanilla Minecraft)

AstraLex Shaders
Shaderpack with very high customization. If you like effects, this shaderpack is made for you!
Create Cobblestone
Adds a block generating cobblestone using SU, stopping cobblestone generators from eating your frames.
BiomeSpy
Rewrites search algorithm for /locate and Nature Compass — 97% less time costs.

Marlow's Crystal Optimizer
Optimization that fixes waiting on the server after crystal break before end crystal entities are cleaned.

Entity View Distance
This mods allows more precise manipulation of entity view distance on client and server

Fast Noise
Vanilla Worldgen optimization mod

Miniature Shader
Extremely lightweight with shadows and reflections

Nostalgia Shader
Capturing the essence of old shaderpacks to create a stylized and modern Minecraft-look.

Os' Colorful Grasses
Fluffier grasses! Tall, short, or original X style versions available, as well as a mix of the three for the optimal balance of visuals & performance. Get the full version on Patreon!
APTweaks: Player Login Optimization and Protection (11.x Classic)
Protects players during login and provides a special "easy" mode for less experience and child players.
Huge Structure Blocks
Structure blocks. But bigger (and optimised). Up to 512 blocks!