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    2,053,304 files checkedFiles from Modrinth and CurseForge we downloaded and checked. Counted on 25 Oct 2026.636,163 files with their code readFiles whose code we turned back into readable code and read, in an isolated environment. Counted on 25 Oct 2026.269,472 projects gradedProjects with a letter from A to F. Counted on 25 Oct 2026.
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    © 2026 ModgradeNot an official Minecraft product. Not approved by or associated with Mojang or Microsoft.

    LoaderOptimization

    Mod

    Helps your game load faster so you can start playing sooner.

    C65/ 100
    • OverviewC
    • SecurityPassed
    • PrivacyNone found
    • AINone found
    • CompatibilityMinecraft 1.21.1
    • ModpacksIn 31
    • ReleasesLatest 2 May

    Download

    loaderoptimization-1.0.0.jar

    Released 2 May 2026 · 30.3 KB

    Passed: our checks found nothing harmful in this file.

    Download
    OverviewSecurityPrivacyAICompatibilityModpacksReleases

    Why grade C

    How grades work

    Strengths

    • Security checks passed

    Points lost

    • No source code link−7 points
    • First release only 6 months ago−7 points
    • No release in 6 months−3 points
    • Some modpacks removed it−1 point
    • Under 5 million downloads−1 point
    All 11 criteria

    • Maintenance

      3 points lost18 / 21
      Last releaseHow long ago the newest file came out, or an existing file was marked as working on a new Minecraft version.6 months ago (2 May 2026) 9 / 12
      Supports popular versionsWhether the project has a file for a Minecraft version that 15% or more of the popular mods updated in the last 6 months also support. A version many modpacks use, like 1.20.1 or 1.21.1, also counts after a release in the last 12 months.1.21.1 on NeoForge. 15% or more of the popular mods updated in the last 6 months also have files for 1.21.1. Latest Minecraft: 26.3. 9 / 9
      Regular releasesIn how many of the last 24 months a new file came out. Full points at 8 months.Does not apply. The project is under 6 months old.

    • Stability

      1 point lost14 / 15
      Removed from modpacksHow many modpacks removed it in a later version of the pack. We can only see this in modpacks with two or more versions. A pack that swaps it for another edition of the same project, or that is rebuilt from scratch, does not count.3 of the 24 modpacks with two or more versions removed it in a later one (13%) See the 3 modpacks9 / 10
      Quick fixesHow often a release needed a quick fix: a new release within 3 days to fix a problem in it.Not measured yet.
      Known conflictsHow many projects say they do not work with it, compared with how widely it is used. Packs, small projects, forks, ports, add-ons, alternatives and old versions do not count.None 5 / 5

    • Transparency

      7 points lost0 / 7
      Source codeWhether the project page links to its source code, so anyone can read what it does.No link on the project page 0 / 7
      Place to report problemsWhether the project page links to a place where players can report problems: an issue tracker.Does not apply. CurseForge links are not in our data.

    • Popularity

      1 point lost3 / 4
      DownloadsDownloads on Modrinth and CurseForge. Full points from 5 million.75,745 3 / 4

    • Track record

      7 points lost1 / 8
      AgeHow long the project has existed. It counts less when no new file came out recently.6 months, 1 release 1 / 8

    • Security

      Passed
      File checksThis check adds no points. It can only take points away.Our checks found nothing harmful in the latest file for recent Minecraft versions. See Security
    Total65 / 100

    35.8 of the 55 points that apply = 65 out of 100. The points above are rounded to whole numbers.

    About

    LoaderOptimization is a NeoForge performance mod focused on reducing startup work and providing tools to inspect loading and runtime behavior. It warms registry hash maps before world loading, caches pack metadata to skip unchanged resource packs on reload, scans the mods folder in a background thread, deduplicates repeated resource locations, trims redundant class scanning, and pre-sorts event listeners. In game, its command suite reports startup phase timings, registry sizes by namespace, mod information, tick statistics and slow ticks, intern-cache performance, and JVM heap and garbage-collection details, with an option to run a full analysis or reset the reports. Each optimization can be toggled individually in the in-game configuration screen, and the mod states that it avoids mixins and changes to other mods’ internals.

    Written from CurseForge . How we write it

    In-game changes

    Does not change the game's code directly.

    Adds no new blocks, items or other content.

    Keeps all of vanilla Minecraft's textures, models and sounds.

    Often used with it

    See all 30
    BadOptimizationsALithiumAAllTheLeaks (Memory Leak Fix)Afix GPU memory leakACrash AssistantA

    Details

    Creator
    konrados
    License
    Not known
    Downloads
    76K
    Created
    2 May 2026
    Official page
    CurseForge

    Security

    No harmful code found

    We checked its files and read their code, without running it.

    What it can do on your computer

    Creates settings files
    The mod keeps its settings in the config folder of your game, where you can change or delete them.

    Why we show this: a mod runs on your computer like any program, so harmful code in it can take your accounts or files. Our checks look for known signs of harm. They cannot prove that a file is harmless. In the grade: malware means no grade, and a Warning in a latest file for a recent Minecraft version lowers it.

    How we checked · The latest file checked, last on 16 Oct 2026
    • FilesWe download the files from Modrinth or CurseForge and look at what is inside them and what their code can do, without running them. Fixed rules tell what is harmful.
      1 latest file, for a recent version. Recent versions: those released in the last 2 years, plus 1.20.1 and 1.21.1, among the most played in modpacks. See each file in Releases
    • Their codeWe turn the code of the files back into readable code and follow what it does, without running it. This shows what it downloads, what it sends and where your login goes.
      Read without running it
    • Looked for, not foundWe looked for these in the file and did not find them.
      The internet, folders outside the game, other programs, updating itself, the webcam or microphone, an AI service.

    Privacy

    We found nothing it sends

    We read its code without running it: it contacts no web address while you play.

    Why we show this: 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 · Its one file read
    • Files readWe read the code without running it. We list each web address the code contacts while you play, and what it sends. Code that is never used is left out.
      The code of its one file, for recent Minecraft versions. See each file in Releases

    AI

    No sign so far that AI was used to make it

    We looked for AI tools in its description, files and images and found none.

    We have not read its changelogs yet.

    No sign of AI in the game

    We found no AI service, AI library or AI model file in its code.

    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 · 4 places read
    • 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.
      Not on Modrinth.
    • Description and changelogsThe description, project page and newest changelogs: sentences saying an AI tool was used, and text pasted from an AI chat.
      Nothing found in the description
      Changelogs not read yet
    • Its filesFiles that AI coding tools leave behind (like AGENTS.md), and the texts inside the files you download.
      Nothing found
    • Images in its filesHidden data in the images of the files you download, where AI image tools write their name and settings.
      Nothing found
    • Code of the modThe code and files of the mod, read without running it: addresses of AI services, AI libraries, AI model files and a place for your own AI key.
      No AI service, AI library or AI model file
      12 code files read

    Compatibility

    See the file in Releases
    NeoForge
    1.2126.126.2

    Point at or tap a version to see its loaders.

    RequiresProjects you must also install for it to work. From the author's lists for its files for recent Minecraft versions, or from its project page.Nothing
    OptionalProjects it can work with but does not need. The author lists them.Nothing
    IncludesProjects packed inside its files.Nothing
    Speed of updatesHow fast it gets a file for new Minecraft versions, on average, compared with similar projects. Not part of the grade.It has no file for Minecraft versions newer than 1.21.1. Many recently updated mods still support 1.21.1.

    Modpacks using this project

    Find modpacks with it

    31 modpacks include LoaderOptimization in at least one of their versions. Here are the 30 most downloaded.

    ModpackDownloadsLast version with it
    KEO RPG optimized314K downloadslast version with it 16 Sep 2026JOSEFO'S PACK 229K downloadslast version with it 17 Oct 2026FOXY COZY28K downloadslast version with it 14 Sep 2026Everything Create - Aeronautics19K downloadslast version with it 6 Jul 2026FOXY COZY LITE6.8K downloadslast version with it 1 Sep 2026Ty-Ty+3.1K downloadslast version with it 18 Oct 2026Antarchy - Ascension1.6K downloadslast version with it 24 Sep 2026Maria's Create Project1.4K downloadslast version with it 26 Sep 2026Aeronautic Colonies894 downloadslast version with it 11 May 2026Tekkit Neo657 downloadslast version with it 5 Oct 2026
    1 to 10 of 30123

    Often in the same modpacks

    Mods that modpacks often add together with LoaderOptimization. Share: how many of the modpacks with LoaderOptimization also have that mod.

    ProjectTypeShareGrade
    BadOptimizationsAModin 81% of the modpacks with LoaderOptimizationLithiumAModin 81% of the modpacks with LoaderOptimizationAllTheLeaks (Memory Leak Fix)AModin 77% of the modpacks with LoaderOptimizationfix GPU memory leakAModin 77% of the modpacks with LoaderOptimizationCrash AssistantAModin 71% of the modpacks with LoaderOptimizationConnectivityAModin 68% of the modpacks with LoaderOptimizationsparkAModin 68% of the modpacks with LoaderOptimizationFastSuiteAModin 65% of the modpacks with LoaderOptimizationChunkyAModin 61% of the modpacks with LoaderOptimizationSophisticated StorageAModin 61% of the modpacks with LoaderOptimization
    1 to 10 of 30123

    Latest files

    The newest file for each Minecraft version and loader. The files for recent versions come first. Recent versions: those released in the last 2 years, plus 1.20.1 and 1.21.1, among the most played in modpacks.

    MinecraftLoaderVersionSecuritySendsRequires
    1.21.1·NeoForge1.0.01.0.0 · loaderoptimization-1.0.0.jarSends: None foundRequires:NothingPassedOur checks found nothing harmful in this file. Its code was read too.

    1 release

    MinecraftLoaderVersionReleasedSecurityGet it onDownload
    1.21.1The latest file for its Minecraft version and loader·NeoForge1.0.01.0.0 · loaderoptimization-1.0.0.jar·2 May 2026PassedOur checks found nothing harmful in this file. Its code was read too.Open this file on CurseForgeDownload · Stable · 30.3 KB