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    2,024,305 files checkedFiles from Modrinth and CurseForge we downloaded and checked. Counted on 24 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 24 Oct 2026.269,486 projects gradedProjects with a letter from A to F. Counted on 24 Oct 2026.
    How it worksMalware we foundAPIAboutPrivacyTermsContact

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

    BadOptimizations

    Mod

    Optimization mod that focuses on things other than rendering.

    A98/ 100
    • OverviewA
    • SecurityPassed
    • PrivacyNone found
    • AIPossible AI tool
    • CompatibilityUp to 26.3
    • ModpacksIn 16,349
    • ReleasesLatest 16 Sep

    Download

    BadOptimizations-2.4.1-26.3-fabric.jar

    Released 16 Sep 2026 · 59.3 KB

    Passed: our checks found nothing harmful in this file.

    Download
    OverviewSecurityPrivacyAICompatibilityModpacksReleases

    Why grade A

    How grades work

    Strengths

    • Regular releases for the newest Minecraft versions
    • Public source code and issue tracker
    • Widely used
    • Around for years

    Points lost

    • Some modpacks removed it−1 point
    All 11 criteria

    • Maintenance

      Full points27 / 27
      Last releaseHow long ago the newest file came out, or an existing file was marked as working on a new Minecraft version.6 weeks ago (16 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.26.3 (latest) on NeoForge and Fabric, 1.20.4 on Forge 9 / 9
      Regular releasesIn how many of the last 24 months a new file came out. Full points at 8 months.Releases in 10 of the last 24 months 6 / 6

    • Stability

      1 point lost21 / 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.55 of the 378 modpacks with two or more versions removed it in a later one (15%) See the 55 modpacks9 / 10
      Quick fixesHow often a release needed a quick fix: a new release within 3 days to fix a problem in it.1 of its 18 releases in 2 years needed a quick fix (6%) 7 / 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.1 known conflict, but it does not count in the grade See the known conflict5 / 5

    • Transparency

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

    • Popularity

      Full points4 / 4
      DownloadsDownloads on Modrinth and CurseForge. Full points from 5 million.128,434,456 4 / 4

    • Track record

      Full points8 / 8
      AgeHow long the project has existed. It counts less when no new file came out recently.2.9 years, 139 releases 8 / 8

    • Security

      Passed
      File checksThis check adds no points. It can only take points away.Our checks found nothing harmful in all 13 latest files for recent Minecraft versions. See Security
    Total98 / 100

    69.5 of the 71 points that apply = 98 out of 100. The points above are rounded to whole numbers.

    About

    BadOptimizations is a client-side optimization mod that reduces repeated work in areas outside rendering, using a collection of small changes intended to add up to broader performance improvements. It caches lightmap textures and skips recalculating them when nothing affecting block brightness, such as gamma, potion effects, or the dimension, has changed. It also streamlines sky-color calculations by using the more expensive biome color sampler only where neighboring biomes have different sky colors, caching results per tick and using a simpler calculation elsewhere. Debug renderers for bees, game events, game tests, and villager AI run only when debugging is enabled and the server has data for them to process. Each optimization can be disabled in the configuration, and the mod can automatically turn off specific options when another installed mod declares an incompatibility. Other mods can also provide hooks that tell BadOptimizations when lightmap or sky-color caches need to be refreshed, avoiding a blanket incompatibility for those caching options.

    Written from Modrinth and CurseForge . How we write it

    In-game changes

    Changes the game's code in 8 areas: Rendering and graphicsChanges 16 game code files in this area: drawing mobs, items, particles and textures on screen., User interfaceChanges 6 game code files in this area: menus, screens, tooltips, the chat window and the in-game overlay., Mobs and their behaviorChanges 6 game code files in this area: mobs, animals, villagers, projectiles and how they move and act., PlayerChanges 4 game code files in this area: your character: movement, abilities, hunger and controls., World renderingChanges 4 game code files in this area: drawing the terrain, sky, clouds and weather., Blocks and fluidsChanges 2 game code files in this area: how blocks, fluids and redstone work., Server and world logicChanges 2 game code files in this area: the world, commands, scoreboards, saved data and game rules. and Networking and multiplayerChanges 2 game code files in this area: connections, the server list and what is sent between your game and a server..

    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
    LithiumAFerriteCoreADynamic FPSAChat HeadsAReese's Sodium OptionsA

    Details

    Creator
    thosea
    License
    MIT License
    Downloads
    128.4M
    Created
    3 Dec 2023
    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. 2 files in your config folder.

    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 · All 20 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.
      20 latest files: the newest file for each Minecraft version and loader. The answer above is about the 13 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.
      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 · All 13 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 all 13 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

    An AI tool may have been used

    GitHub Copilot (code review) and GitHub Copilot (coding agent) took part in its pull requests.

    This does not show that it was used to make the files you download.

    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 · 8 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.
      Nothing found
      108 commits read
    • Pull requestsThe recent pull requests, comments, topics and README of the GitHub repository.
      Possible signThe tool was seen around the project. This does not show that it was used to make the files you download.: GitHub Copilot (code review) took part in 8 of 10 pull requests · See one Possible signThe tool was seen around the project. This does not show that it was used to make the files you download.: GitHub Copilot (coding agent) took part in 9 of 10 pull requests · See one
    • 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
      40 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
      1 image read
    • Icon and galleryThe metadata of the original icon and gallery images of the project.
      Nothing found
      1 image read
    • 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
      35 code files read

    Compatibility

    See all 139 files
    Fabric
    NeoForge
    Forge
    1.191.2126.1

    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.Install it in your game only. Servers do not need it, so you can join any server.
    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.Faster than most mods. On average, it gets a file 2 days after a new Minecraft version comes out. Measured on the last 6 Minecraft versions.

    Known conflicts

    These projects do not work together with BadOptimizations: their authors or BadOptimizations' author say so. If you install both, the game can crash or some features can stop working. Some of them do the same job as BadOptimizations, so you only need one.

    ProjectTypeDownloadsDeclared by
    VisualSkyMod820 downloadsdeclared by VisualSky

    Related projects

    Projects that need BadOptimizations to work.

    ProjectTypeDownloadsGrade
    GRIFFO - LITE100%Modpack: 100% of its graded mods are A or BModpack274 downloadsEchoes of the Abyss64%Modpack: 64% of its graded mods are A or BModpack116 downloads

    Modpacks using this project

    Find modpacks with it
    Modpacks that released a new version with this project, each month
    3K1.5K0
    Oct 2024: 669 modpacksNov 2024: 666 modpacksDec 2024: 723 modpacksJan 2025: 860 modpacksFeb 2025: 847 modpacksMar 2025: 982 modpacksApr 2025: 1,029 modpacksMay 2025: 1,070 modpacksJun 2025: 1,110 modpacksJul 2025: 1,157 modpacksAug 2025: 1,207 modpacksSep 2025: 1,165 modpacksOct 2025: 1,340 modpacksNov 2025: 1,399 modpacksDec 2025: 1,598 modpacksJan 2026: 1,612 modpacksFeb 2026: 1,482 modpacksMar 2026: 1,543 modpacksApr 2026: 1,653 modpacksMay 2026: 1,891 modpacksJun 2026: 2,044 modpacksJul 2026: 2,201 modpacksAug 2026: 2,075 modpacksSep 2026: 2,000 modpacks
    Oct 2024Oct 2025Sep 2026
    Modpacks that released a new version with this project, each month
    Oct 2024669
    Nov 2024666
    Dec 2024723
    Jan 2025860
    Feb 2025847
    Mar 2025982
    Apr 20251,029
    May 20251,070
    Jun 20251,110
    Jul 20251,157
    Aug 20251,207
    Sep 20251,165
    Oct 20251,340
    Nov 20251,399
    Dec 20251,598
    Jan 20261,612
    Feb 20261,482
    Mar 20261,543
    Apr 20261,653
    May 20261,891
    Jun 20262,044
    Jul 20262,201
    Aug 20262,075
    Sep 20262,000

    More modpacks put it in their new versions than a year ago: 1,977 a month now, 1,123 a year agoThe average of the last 6 months, compared with the same 6 months a year before. We say it only when the change is large..

    16,349 modpacks include BadOptimizations in at least one of their versions. Here are the 30 most downloaded.

    ModpackDownloadsLast version with it
    Better MC [FORGE] - BMC421.1M downloadslast version with it 9 Oct 2026Prominence™ II: Hasturian Era15.4M downloadslast version with it 23 Oct 2026Zombie Invade 100 Days15.3M downloadslast version with it 13 Dec 2025COBBLEVERSE - Pokemon Adventure [Cobblemon]12.6M downloadslast version with it 22 Jul 2026DeceasedCraft - Urban Zombie Apocalypse9.8M downloadslast version with it 17 Jul 2026Cursed Walking - A Modern Zombie Apocalypse8.7M downloadslast version with it 8 Aug 2026Better MC [FABRIC] - BMC25.9M downloadslast version with it 15 Jul 2026Cisco's Fantasy Medieval RPG [Ultimate]5.1M downloadslast version with it 1 Jun 2026Immersed With Shaders4.5M downloadslast version with it 19 Oct 2026BattleArmory TACZ3.8M downloadslast version with it 21 Aug 2026
    1 to 10 of 30123

    Often in the same modpacks

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

    ProjectTypeShareGrade
    LithiumAModin 56% of the modpacks with BadOptimizationsFerriteCoreAModin 48% of the modpacks with BadOptimizationsDynamic FPSAModin 48% of the modpacks with BadOptimizationsChat HeadsAModin 45% of the modpacks with BadOptimizationsReese's Sodium OptionsAModin 43% of the modpacks with BadOptimizationsSodium ExtraAModin 40% of the modpacks with BadOptimizationssparkAModin 40% of the modpacks with BadOptimizationsFresh AnimationsAResource packin 39% of the modpacks with BadOptimizationsMod MenuAModin 38% of the modpacks with BadOptimizationsBetterF3AModin 38% of the modpacks with BadOptimizations
    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
    26.3·Fabric2.4.12.4.1 · BadOptimizations-2.4.1-26.3-fabric.jarSends: None foundRequires:NothingPassedOur checks found nothing harmful in this file. Its code was read too.
    26.3·NeoForge2.4.12.4.1 · BadOptimizations-2.4.1-26.3-forge.jarSends: None foundRequires:NothingPassedOur checks found nothing harmful in this file. Its code was read too.
    26.2·Fabric2.4.12.4.1 · BadOptimizations-2.4.1-26.2-fabric.jarSends: None foundRequires:NothingPassedOur checks found nothing harmful in this file. Its code was read too.
    26.2·NeoForge2.4.12.4.1 · BadOptimizations-2.4.1-26.2-forge.jarSends: None foundRequires:NothingPassedOur checks found nothing harmful in this file. Its code was read too.
    26.1 to 26.1.2·Fabric2.4.12.4.1 · BadOptimizations-2.4.1-26.1-fabric.jarSends: None foundRequires:NothingPassedOur checks found nothing harmful in this file. Its code was read too.
    26.1 to 26.1.2·NeoForge2.4.12.4.1 · BadOptimizations-2.4.1-26.1-forge.jarSends: None foundRequires:NothingPassedOur checks found nothing harmful in this file. Its code was read too.
    1.21.11·Fabric, NeoForge2.4.12.4.1 · BadOptimizations-2.4.1-1.21.11.jarSends: None foundRequires:NothingPassedOur checks found nothing harmful in this file. Its code was read too.
    1.21.10·Fabric, NeoForge2.4.12.4.1 · BadOptimizations-2.4.1-1.21.10.jarSends: None foundRequires:NothingPassedOur checks found nothing harmful in this file. Its code was read too.
    1.21.9·Fabric, NeoForge2.3.32.3.3 · BadOptimizations-2.3.3-1.21.9-21.10.jarSends: None foundRequires:NothingPassedOur checks found nothing harmful in this file. Its code was read too.
    1.21.6 to 1.21.8·Fabric, NeoForge2.4.12.4.1 · BadOptimizations-2.4.1-1.21.6-21.8.jarSends: None foundRequires:NothingPassedOur checks found nothing harmful in this file. Its code was read too.
    1 to 10 of 2012

    139 releases

    MinecraftLoaderVersionReleasedSecurityGet it onDownload
    26.3The latest file for its Minecraft version and loader·NeoForge2.4.12.4.1 · BadOptimizations-2.4.1-26.3-forge.jar (main file)·16 Sep 2026PassedOur checks found nothing harmful in this file. Its code was read too.Open this file on ModrinthOpen this file on CurseForgeDownload · Stable · 60.1 KB
    26.3The latest file for its Minecraft version and loader·Fabric2.4.12.4.1 · BadOptimizations-2.4.1-26.3-fabric.jar (main file)·16 Sep 2026PassedOur checks found nothing harmful in this file. Its code was read too.Open this file on ModrinthOpen this file on CurseForgeDownload · Stable · 59.3 KB
    26.2The latest file for its Minecraft version and loader·Fabric2.4.12.4.1 · BadOptimizations-2.4.1-26.2-fabric.jar (main file)·16 Jun 2026PassedOur checks found nothing harmful in this file. Its code was read too.Open this file on ModrinthOpen this file on CurseForgeDownload · Stable · 59.3 KB
    26.2The latest file for its Minecraft version and loader·NeoForge2.4.12.4.1 · BadOptimizations-2.4.1-26.2-forge.jar (main file)·16 Jun 2026PassedOur checks found nothing harmful in this file. Its code was read too.Open this file on ModrinthOpen this file on CurseForgeDownload · Stable · 60.1 KB
    26.1 to 26.1.226.1 to 26.1.2The latest file for its Minecraft version and loader·NeoForge2.4.12.4.1 · BadOptimizations-2.4.1-26.1-forge.jar (main file)·29 Mar 2026PassedOur checks found nothing harmful in this file. Its code was read too.Open this file on ModrinthOpen this file on CurseForgeDownload · Stable · 61.3 KB
    26.1 to 26.1.226.1 to 26.1.2The latest file for its Minecraft version and loader·Fabric2.4.12.4.1 · BadOptimizations-2.4.1-26.1-fabric.jar (main file)·29 Mar 2026PassedOur checks found nothing harmful in this file. Its code was read too.Open this file on ModrinthOpen this file on CurseForgeDownload · Stable · 60.5 KB
    1.21.11The latest file for its Minecraft version and loader·Fabric, NeoForge2.4.12.4.1 · BadOptimizations-2.4.1-1.21.11.jar (main file)·16 Dec 2025PassedOur checks found nothing harmful in this file. Its code was read too.Open this file on ModrinthOpen this file on CurseForgeDownload · Stable · 263.2 KB
    1.21.10The latest file for its Minecraft version and loader·Fabric, NeoForge2.4.12.4.1 · BadOptimizations-2.4.1-1.21.10.jar (main file)·15 Dec 2025PassedOur checks found nothing harmful in this file. Its code was read too.Open this file on ModrinthOpen this file on CurseForgeDownload · Stable · 274.3 KB
    1.21.6 to 1.21.81.21.6 to 1.21.8The latest file for its Minecraft version and loader·Fabric, NeoForge2.4.12.4.1 · BadOptimizations-2.4.1-1.21.6-21.8.jar (main file)·15 Dec 2025PassedOur checks found nothing harmful in this file. Its code was read too.Open this file on ModrinthOpen this file on CurseForgeDownload · Stable · 277.1 KB
    1.21.2 to 1.21.51.21.2 to 1.21.5The latest file for its Minecraft version and loader·Fabric, NeoForge2.4.12.4.1 · BadOptimizations-2.4.1-1.21.2-21.5.jar (main file)·15 Dec 2025PassedOur checks found nothing harmful in this file. Its code was read too.Open this file on ModrinthOpen this file on CurseForgeDownload · Stable · 276.1 KB
    1.21.1The latest file for its Minecraft version and loader·Fabric, NeoForge2.4.12.4.1 · BadOptimizations-2.4.1-1.21.1.jar (main file)·15 Dec 2025PassedOur checks found nothing harmful in this file. Its code was read too.Open this file on ModrinthOpen this file on CurseForgeDownload · Stable · 276.9 KB
    1.20.5 to 1.20.61.20.5 to 1.20.6The latest file for its Minecraft version and loader·Fabric, NeoForge2.4.12.4.1 · BadOptimizations-2.4.1-1.20.5-20.6.jar (main file)·15 Dec 2025PassedOur checks found nothing harmful in this file. Its code was read too.Open this file on ModrinthOpen this file on CurseForgeDownload · Stable · 276.9 KB
    1.20.2 to 1.20.41.20.2 to 1.20.4The latest file for its Minecraft version and loader·Fabric, NeoForge2.4.12.4.1 · BadOptimizations-2.4.1-1.20.2-20.4.jar (main file)·15 Dec 2025PassedOur checks found nothing harmful in this file. Its code was read too.Open this file on ModrinthOpen this file on CurseForgeDownload · Stable · 299.3 KB
    1.20.1The latest file for its Minecraft version and loader·Fabric, Forge2.4.12.4.1 · BadOptimizations-2.4.1-1.20.1.jar (main file)·15 Dec 2025PassedOur checks found nothing harmful in this file. Its code was read too.Open this file on ModrinthOpen this file on CurseForgeDownload · Stable · 449.4 KB
    1.21.10·Fabric, NeoForge2.4.02.4.0 · BadOptimizations-2.4.0-1.21.10.jar (main file)·27 Nov 2025PassedOur checks found nothing harmful in this file.Open this file on ModrinthOpen this file on CurseForgeDownload · Stable · 276.2 KB
    1.21.6 to 1.21.81.21.6 to 1.21.8·Fabric, NeoForge2.4.02.4.0 · BadOptimizations-2.4.0-1.21.6-21.8.jar (main file)·27 Nov 2025PassedOur checks found nothing harmful in this file.Open this file on ModrinthOpen this file on CurseForgeDownload · Stable · 279.4 KB
    1.21.2 to 1.21.51.21.2 to 1.21.5·Fabric, NeoForge2.4.02.4.0 · BadOptimizations-2.4.0-1.21.2-21.5.jar (main file)·27 Nov 2025PassedOur checks found nothing harmful in this file.Open this file on ModrinthOpen this file on CurseForgeDownload · Stable · 278.3 KB
    1.21.1·Fabric, NeoForge2.4.02.4.0 · BadOptimizations-2.4.0-1.21.1.jar (main file)·27 Nov 2025PassedOur checks found nothing harmful in this file.Open this file on ModrinthOpen this file on CurseForgeDownload · Stable · 279.3 KB
    1.20.5 to 1.20.61.20.5 to 1.20.6·Fabric, NeoForge2.4.02.4.0 · BadOptimizations-2.4.0-1.20.5-20.6.jar (main file)·27 Nov 2025PassedOur checks found nothing harmful in this file.Open this file on ModrinthOpen this file on CurseForgeDownload · Stable · 279.3 KB
    1.20.2 to 1.20.41.20.2 to 1.20.4·Fabric, NeoForge2.4.02.4.0 · BadOptimizations-2.4.0-1.20.2-20.4.jar (main file)·27 Nov 2025PassedOur checks found nothing harmful in this file.Open this file on ModrinthOpen this file on CurseForgeDownload · Stable · 302.3 KB
    1 to 20 of 13912345…7

    Quick fixes

    In the last 2 years, 1 release needed a quick fix: a new release within 3 days to fix a problem. This counts in the grade, but it is too few to lose points.

    See them, newest first

    Quick fixesReleases followed within 3 days by a new release that fixes a problem in them.1

    • 2.3.24 Oct 2025Version 2.3.2 (1.21.9/1.21.0-only): - Fix crashing when rendering a mannequin