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    2,054,198 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 2026.269,438 projects gradedProjects with a letter from A to F. Counted on 25 Oct 2026.
    How it worksMalware we foundAPIAboutPrivacyTermsContact

    © 2026 ModgradeNot an official Minecraft product. Not approved by or associated with Mojang or Microsoft.

    Random Optimization

    Mod

    Improves game performance and fixes bugs for smoother play.

    B89/ 100
    • OverviewB
    • SecurityPassed
    • PrivacyNone found
    • AINone found
    • CompatibilityUp to 1.21.1
    • ModpacksIn 34
    • ReleasesLatest 23 Sep

    Download

    randomoptimization-1.7.5-all-1.21.1.jar

    Released 23 Sep 2026 · 148.0 KB

    Passed: our checks found nothing harmful in this file.

    Download
    OverviewSecurityPrivacyAICompatibilityModpacksReleases

    Why grade B

    How grades work

    Strengths

    • Security checks passed
    • Public source code and issue tracker

    Points lost

    • Releases replaced within 3 days to fix a problem−4 points
    • First release only 9 months ago−2 points
    • Releases in only 6 of the last 24 months−1 point
    • Under 5 million downloads−1 point
    All 11 criteria

    • Maintenance

      1 point lost26 / 27
      Last releaseHow long ago the newest file came out, or an existing file was marked as working on a new Minecraft version.4 weeks ago (24 Sep 2026) 12 / 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, 1.20.6 on Forge. 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.Releases in 6 of the last 24 months 5 / 6

    • Stability

      4 points lost18 / 22
      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.2 of the 28 modpacks with two or more versions removed it in a later one (7%) 10 / 10
      Quick fixesHow often a release needed a quick fix: a new release within 3 days to fix a problem in it.4 of its 16 releases in 2 years needed a quick fix (25%) See the 4 releases3 / 7
      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

      Full points10 / 10
      Source codeWhether the project page links to its source code, so anyone can read what it does.GitHub · colinxu2020/random-optimization 7 / 7
      Place to report problemsWhether the project page links to a place where players can report problems: an issue tracker.GitHub issues · colinxu2020/Random-Optimization 3 / 3

    • Popularity

      1 point lost3 / 4
      DownloadsDownloads on Modrinth and CurseForge. Full points from 5 million.267,938 3 / 4

    • Track record

      2 points lost6 / 8
      AgeHow long the project has existed. It counts less when no new file came out recently.9 months, 20 releases 6 / 8

    • Security

      Passed
      File checksThis check adds no points. It can only take points away.Our checks found nothing harmful in both latest files for recent Minecraft versions. See Security
    Total89 / 100

    63.3 of the 71 points that apply = 89 out of 100. The points above are rounded to whole numbers.

    About

    Random Optimization is a configurable performance and bug-fix mod that targets structure searches, pack loading, startup, item drops, and boat behavior. It reduces costly structure-search work when locating Buried Treasure or using /locate, helping prevent severe server stalls during searches and when interacting with map-containing chests. Its resource and data pack indexing avoids repeated scans and lookups, speeding reloads across compressed packs and other supported resource sources, including directory-based packs, mod resources, and vanilla resources. The mod can defer DataFixerUpper loading to improve startup time and fix boat fall damage at certain heights. Deterministic item drops place spawned items without randomized positions, which can make Redstone contraptions easier to design; this feature is disabled by default in newer releases.

    Written from Modrinth , CurseForge and the GitHub README . How we write it

    In-game changes

    Changes the game's code in 6 areas: Game data and resourcesChanges 4 game code files in this area: recipes, tags, advancements, language files and other game data., World generationChanges 1 game code file in this area: terrain, biomes and structures made when new land is created., Mobs and their behaviorChanges 1 game code file in this area: mobs, animals, villagers, projectiles and how they move and act., Blocks and fluidsChanges 1 game code file in this area: how blocks, fluids and redstone work., Game coreChanges 1 game code file in this area: the main loop, lighting and other code the whole game uses. and Server and world logicChanges 1 game code file in this area: the world, commands, scoreboards, saved data and game rules..

    Adds 1 block: Example Block; 1 item: Example Item.

    Counted from the names and data files in the mod, so the list may not be complete.

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

    Often used with it

    See all 30
    Immersive OptimizationAServerCoreAPacket FixerABadOptimizationsAFast IP PingA

    Details

    Creator
    colinxu2020
    License
    GNU Lesser General Public License v3.0 only
    Downloads
    271K
    Created
    17 Jan 2026
    Official pages
    Modrinth , CurseForge
    Links
    Source code , Issues

    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. 1 file in your config folder.
    Connects to the internet
    It has code that can go online, for example to check for updates, load skins or send crash reports. Only in its files for Forge 1.20.1 to 1.20.6. See Privacy

    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 · Both latest files 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.
      2 latest files: the newest file for each Minecraft version and loader. Both are for recent versions. 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
    • 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.
    • Looked for, not foundWe looked for these in the file and did not find them.
      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 · Both files 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 both files, for recent Minecraft versions. See each file in Releases
    • Author on ModrinthThe disclosure form on Modrinth, where the author declares crash reports, usage data and advertisements. Since 13 Aug 2026, Modrinth's rules require it when a project collects data on its users or shows advertisements.
      Nothing declared about crash reports, usage data or advertisements.

    AI

    No sign so far that AI was used to make it

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

    We have not read its code history 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 · 5 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.
      No AI content or AI features declared.
    • Code historyThe public code on GitHub: who made each change, credit lines such as "Co-authored-by", and its files.
      Not read yet
    • 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
      30 changelogs read
    • 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
      27 code files read

    Compatibility

    See all 20 files
    NeoForge
    Forge
    1.201.2126.126.3

    Point at or tap a version to see its loaders.

    Runs onWhere to install it: in your game, on the server, or both. As the author says on Modrinth.Works in your game or on a server. With both, you get extra features.
    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

    34 modpacks include Random Optimization in at least one of their versions. Here are the 30 most downloaded.

    ModpackDownloadsLast version with it
    TerraFirma Rebirth 2133K downloadslast version with it 9 Sep 2026Rhinocraft62K downloadslast version with it 3 Oct 2026Block Railway Engineering: MTR, Create, IR and more!47K downloadslast version with it 18 Sep 2026[UO]Ultramodern optimization42K downloadslast version with it 15 Sep 2026Pix Android Boost14K downloadslast version with it 16 Oct 2026Ultimate Iron Man12K downloadslast version with it 26 May 2026[TLWS]The Last World Shines11K downloadslast version with it 4 Oct 2026Asai Integrated Modpack6.8K downloadslast version with it 23 Oct 2026Crafted Madness: Modern Era5.9K downloadslast version with it 3 Oct 2026shader and optimize5.7K downloadslast version with it 12 Oct 2026
    1 to 10 of 30123

    Often in the same modpacks

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

    ProjectTypeShareGrade
    Immersive OptimizationAModin 62% of the modpacks with Random OptimizationServerCoreAModin 62% of the modpacks with Random OptimizationPacket FixerAModin 62% of the modpacks with Random OptimizationBadOptimizationsAModin 62% of the modpacks with Random OptimizationFast IP PingAModin 59% of the modpacks with Random OptimizationNo Chat ReportsAModin 59% of the modpacks with Random OptimizationKrypton RenoAModin 56% of the modpacks with Random OptimizationFast NoiseAModin 56% of the modpacks with Random OptimizationFleroviumAModin 56% of the modpacks with Random OptimizationAlternate CurrentAModin 53% of the modpacks with Random Optimization
    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·NeoForge1.7.51.7.5 · randomoptimization-1.7.5-all-1.21.1.jarSends: None foundRequires:NothingPassedOur checks found nothing harmful in this file. Its code was read too.
    1.20.1 to 1.20.6·Forge1.7.51.7.5 · randomoptimization-1.7.5-all-1.20.1.jarSends: None foundRequires:NothingPassedOur checks found nothing harmful in this file. Its code was read too.

    20 releases

    MinecraftLoaderVersionReleasedSecurityGet it onDownload
    1.20.1 to 1.20.61.20.1 to 1.20.6The latest file for its Minecraft version and loader·Forge1.7.51.7.5 · randomoptimization-1.7.5-all-1.20.1.jar (main file)·23 Sep 2026PassedOur checks found nothing harmful in this file. Its code was read too.Open this file on ModrinthOpen this file on CurseForgeDownload · Stable · 780.6 KB
    1.21.1The latest file for its Minecraft version and loader·NeoForge1.7.51.7.5 · randomoptimization-1.7.5-all-1.21.1.jar (main file)·23 Sep 2026PassedOur checks found nothing harmful in this file. Its code was read too.Open this file on ModrinthOpen this file on CurseForgeDownload · Stable · 148.0 KB
    1.21.1·NeoForge1.7.41.7.4 · randomoptimization-1.7.4-all.jar (main file)·17 Aug 2026PassedOur checks found nothing harmful in this file. Its code was read too.Open this file on ModrinthOpen this file on CurseForgeDownload · Stable · 148.0 KB
    1.20.1 to 1.20.61.20.1 to 1.20.6·Forge1.7.41.7.4 · randomoptimization-1.7.4-all.jar (main file)·17 Aug 2026PassedOur checks found nothing harmful in this file.Open this file on ModrinthOpen this file on CurseForgeDownload · Stable · 780.5 KB
    1.20.1 to 1.20.61.20.1 to 1.20.6·Forge1.7.31.7.3 · randomoptimization-1.7.3-all.jar (main file)·7 Aug 2026PassedOur checks found nothing harmful in this file.Open this file on ModrinthOpen this file on CurseForgeDownload · Stable · 782.0 KB
    1.21.1·NeoForge1.7.31.7.3 · randomoptimization-1.7.3-all.jar (main file)·7 Aug 2026PassedOur checks found nothing harmful in this file.Open this file on ModrinthOpen this file on CurseForgeDownload · Stable · 149.3 KB
    1.20.1 to 1.20.61.20.1 to 1.20.6·Forge1.7.21.7.2 · randomoptimization-1.7.2-all.jar (main file)·6 Aug 2026PassedOur checks found nothing harmful in this file.Open this file on ModrinthOpen this file on CurseForgeDownload · Stable · 782.0 KB
    1.21.1·NeoForge1.7.21.7.2 · randomoptimization-1.7.2-all.jar (main file)·6 Aug 2026PassedOur checks found nothing harmful in this file.Open this file on ModrinthNot on CurseForgeDownload · Stable · 149.3 KB
    1.20.1 to 1.20.61.20.1 to 1.20.6·Forge1.7.11.7.1 · randomoptimization-1.7.1-all.jar (main file)·6 Aug 2026PassedOur checks found nothing harmful in this file.Open this file on ModrinthOpen this file on CurseForgeDownload · Stable · 781.4 KB
    1.21.1·NeoForge1.7.01.7.0 · randomoptimization-1.7.0-all.jar (main file)·5 Aug 2026PassedOur checks found nothing harmful in this file.Open this file on ModrinthOpen this file on CurseForgeDownload · Stable · 148.5 KB
    1.20.1 to 1.20.61.20.1 to 1.20.6·Forge1.7.01.7.0 · randomoptimization-1.7.0-all.jar (main file)·5 Aug 2026PassedOur checks found nothing harmful in this file.Open this file on ModrinthOpen this file on CurseForgeDownload · Stable · 781.4 KB
    1.20.1 to 1.20.61.20.1 to 1.20.6·Forge1.6.01.6.0 · randomoptimization-1.6.0-all.jar (main file)·26 Jul 2026PassedOur checks found nothing harmful in this file.Open this file on ModrinthNot on CurseForgeDownload · Stable · 649.2 KB
    1.21.1·NeoForge1.6.01.6.0 · randomoptimization-1.6.0.jar (main file)·24 Jul 2026PassedOur checks found nothing harmful in this file.Open this file on ModrinthNot on CurseForgeDownload · Stable · 28.0 KB
    1.20.1 to 1.20.61.20.1 to 1.20.6·Forge1.5.11.5.1 · randomoptimization-1.5.1-all.jar (main file)·14 Jul 2026PassedOur checks found nothing harmful in this file.Open this file on ModrinthNot on CurseForgeDownload · Stable · 649.7 KB
    1.20.1 to 1.20.61.20.1 to 1.20.6·Forge1.5.01.5.0 · randomoptimization-1.5.0-all.jar (main file)·14 Jul 2026PassedOur checks found nothing harmful in this file.Open this file on ModrinthNot on CurseForgeDownload · Stable · 649.5 KB
    1.20.1 to 1.20.61.20.1 to 1.20.6·Forge1.4.01.4.0 · randomoptimization-1.4.0-all.jar (main file)·10 Jul 2026PassedOur checks found nothing harmful in this file.Open this file on ModrinthNot on CurseForgeDownload · Stable · 638.4 KB
    1.20.1 to 1.20.61.20.1 to 1.20.6·Forge1.3.01.3.0 · randomoptimization-1.3.0-all.jar (main file)·18 May 2026PassedOur checks found nothing harmful in this file.Open this file on ModrinthNot on CurseForgeDownload · Stable · 637.4 KB
    1.20.1 to 1.20.61.20.1 to 1.20.6·Forge1.2.01.2.0 · randomoptimization-1.2.0-all.jar (main file)·18 Mar 2026PassedOur checks found nothing harmful in this file.Open this file on ModrinthNot on CurseForgeDownload · Stable · 636.8 KB
    1.20.1 to 1.20.61.20.1 to 1.20.6·Forge1.1.01.1.0 · randomoptimization-1.1.0.jar (main file)·16 Mar 2026PassedOur checks found nothing harmful in this file.Open this file on ModrinthNot on CurseForgeDownload · Stable · 19.1 KB
    1.20.1 to 1.20.61.20.1 to 1.20.6·Forge1.0.01.0.0 · randomoptimization-1.0.0-all.jar (main file)·17 Jan 2026PassedOur checks found nothing harmful in this file.Open this file on ModrinthNot on CurseForgeDownload · Stable · 636.7 KB

    Quick fixes

    In the last 2 years, 4 releases needed a quick fix: a new release within 3 days to fix a problem. This lowers the grade by 4 points.

    See them, newest first

    Quick fixesReleases followed within 3 days by a new release that fixes a problem in them.4

    • 1.7.16 Aug 2026Fix crash.
    • 1.7.26 Aug 2026Fix compat issues with FancyMenu. Partly fixed in 1.7.0, but…
    • 1.5.114 Jul 2026Random Optimization 1.5.1 Fixed - Fixed an IllegalClassLoadError that could crash the…
    • 1.2.018 Mar 2026Fix refmap