ModsJava
lightspeed-kryo
Java mod listed for Minecraft 1.19–1.21. Downloads from the MC Java Mods app on Android.
I don't know my version or loader
Open the Minecraft launcher and look at the profile you play on — it names both, like fabric-loader-1.21.4. The version also shows in the bottom-right corner of the game's main menu.
No loader in the profile name? Then it's plain Minecraft, and these mods won't run — you need Fabric or NeoForge installed first.
Describes
Porting and improving the high version of lightspeed, while changing the serialization library to kryo
Key Differences
Compared to the original version, this port introduces the following key improvements and features:
- Replaced Serialization Library: The serialization library has been switched from Java's
serto the more performantKryo. - Expanded Caching: More categories have been added to the cache to accelerate the loading process, including:
- Recipes
- Advancements
- Tags
- Loading Optimizations: Implemented optimizations for resource pack paths and JSON file loading to reduce startup times.
- Integrated LazyDFU: This port includes the functionality of
LazyDFUto further enhance game startup and loading performance.
Known Issues
You may encounter the following problems while using this version:
- KubeJS Compatibility:
- Problem: The built-in
TagLoaderfeature may causetag.jsscripts written forKubeJSto fail. - Solution: This feature can be disabled in the mod's configuration file.
- Model Loading Failures:
- In some cases, certain models may fail to load, resulting in missing textures (the purple and black "checkerboard" pattern).
Quick facts
- Edition: Minecraft Java
- File type: .jar
- Minecraft versions listed: 1.21.1, 1.20.1, 1.19.2
- How to install: Install the matching mod loader (Forge, Fabric or NeoForge) for your Minecraft version. → Download the .jar. → Put it in the .minecraft/mods folder and launch that loader profile.
- Where to get it: Opens on CurseForge — not every file is mirrored on our own servers.
Install steps are the general flow for this file type — How to install Minecraft Java mods & modpacks walks through it step by step.
File checked by MCModsHub
- Ships as lightspeed-1.20.1-forge-1.2.3.jar — drop this file into the mods folder
- Download size: 1014 KB
- Download link checked 3 Oct 2026 — working
These come from our own check of the pack file, not from the source page.