Extreme Optimization!
ModpackA modpack that helps your game run faster with fewer freezes.
Mod grades
How grades workModpacks get no grade of their own, so we show the grades of its mods. Of its 19 graded mods, 16 are graded A or B, 3 C and none D to F. Its last update came out 5 months ago, for Minecraft 1.21.4. See the mods
Images
About
Extreme Optimization! is a performance-focused modpack intended to improve Minecraft’s frame rate, reduce freezes and lower memory and CPU use, with a vetted selection of mods rather than added gameplay content. Its client and single-player collection targets rendering performance, chunk-loading speed, game-setting controls and other logic, while a separate server version focuses on chunk loading, memory and CPU usage, and related optimizations. The pack also offers optional collections for quality-of-life and vanilla-style visual features, including ambient fireflies and glowworms, damage-reactive camera tilt, dynamic lights, animated and connected textures, custom entity models, and custom item textures. Multiplayer additions include connections to older server versions, support for multiple server versions, and RakNet-based improvements for unreliable or rate-limited connections. The base pack is designed to concentrate on performance, and the author also presents it as a starting point for building a customized modpack.
Written from Modrinth . How we write it
Mods in this pack
The mods of its newest release (Minecraft 1.21.1 · NeoForge, 9 Jun 2026). Each check result is for the latest files of that mod, which may not be the version in this pack.
Cloth Config APIMod · 569.3M downloadsAPassed
Entity CullingMod · 425.1M downloadsAPassed
SodiumMod · 412.7M downloadsAPassed
ModernFixMod · 334.2M downloadsAPassed
ImmediatelyFastMod · 329.5M downloadsAPassed
Puzzles LibMod · 291.5M downloadsAPassed
FerriteCoreMod · 243.7M downloadsAPassed
LithiumMod · 242.4M downloadsAPassed
BadOptimizationsMod · 128.4M downloadsAPassed
More CullingMod · 101.8M downloadsAPassed
FleroviumMod · 29.9M downloadsAPassed
Better BedsMod · 26.6M downloadsCPassed
IxerisMod · 23.4M downloadsAPassed
Fast Item FramesMod · 23.3M downloadsAPassed
GnetumMod · 18.4M downloadsAPassed
Krypton RenoMod · 16.6M downloadsAPassed
VanillinMod · 12M downloadsCPassed
Async LoggerMod · 4.2M downloadsBPassed
KerriaMod · 2.1M downloadsCPassedChanges since the previous release
Compared with the release of 10 Mar 2025 for the same platform, Minecraft version and loader. We do not compare the versions of the mods yet.
- Added
- FleroviumMore CullingImmediatelyFastVanillinGnetumCloth Config APISodiumFast Item FramesKrypton RenoEntity CullingPuzzles LibKerriaBadOptimizationsBetter BedsIxerisAsync Logger
- Removed
Concurrent Chunk Management Engine (NeoForge)Modrinth project KuNKN7d2
Resourceful Config
ScalableLux
Structure Layout Optimizer- Share graded A or B
- down 16 points
Details
- Creator
- chmonyasik
- License
- Creative Commons Attribution Non Commercial 4.0 International
- Downloads
- 40K
- Created
- 19 Nov 2022
- Official page
- Modrinth
Security
No harmful code found in its mods
We checked all 19 mods and the files in the pack itself, without running them.
Why we show this: a modpack installs the files of its mods, and each mod runs on your computer like any program. Our checks look for known signs of harm. They cannot prove that a file is harmless. In the grade: a modpack has no grade of its own, and each mod's result counts in that mod's grade.
How we checked
- Its projects19 mods
- Files in the pack itself12 settings files, no mod jars.
- Author on ModrinthThe disclosure form on Modrinth, where the author declares that the project reads or edits things on your system outside the game. Since 13 Aug 2026, Modrinth's rules require it when this applies.Nothing declared about your system outside the game.
Privacy
1 mod sends something about you
We read the code of all 19 of its mods, without running it.
Why we show this: a modpack runs the code of its mods, and a mod can send things about you over the internet, like your player name or your login. Contacting an address to check for updates or download files sends nothing about you. Not in the grade: sending data can be normal for what a mod does.
How we checked
- Go online onlyTheir code contacts a web address, for example to check for updates. We found nothing it sends about you.1 mod
- Send nothingTheir code contacts no web address.17 mods
AI
AI used in 3 of the 19 mods we checked
We found an AI tool in them, or their authors declared AI content.
No sign so far that AI was used to make the pack itself
We looked for AI tools in its texts and found none.
We have not read its files and images yet.
Why we show this: some players and servers avoid projects made with AI, and AI in the game can send what you write to an online service. Not in the grade: using AI does not tell whether a project works well or is kept up to date.
How we checked
- Author on ModrinthThe disclosure form on Modrinth. Since 13 Aug 2026, Modrinth's rules require it when a substantial part of the code is AI output, when an asset is mainly AI output, or when the project or its page relies on generative AI.No AI content declared.
- Description and changelogsThe description, project page and newest changelogs: sentences saying an AI tool was used, and text pasted from an AI chat.Nothing found9 of 20 changelogs read
- Its filesFiles that AI coding tools leave behind (like AGENTS.md), and the texts inside the files you download.Not read yet
- Images in its filesHidden data in the images of the files you download, where AI image tools write their name and settings.Not read yet
Compatibility
See all 29 filesPoint at or tap a version to see its loaders.