LightSpeedRe - Launch optimizations Mod for Minecraft 1.20.1, 1.21.1
Reduces your waiting time by loading modpacks significantly faster (currently 48% - 71%)
NeoForge
ForgeAbout the LightSpeedRe - Launch optimizations mod
This is a high-version (1.20.1+) port of the Lightspeed mod. It removes the model-baking optimizations that were already implemented in vanilla Minecraft 1.20.1, keeping only the resource-pack cache feature, which speeds up launch times. (Currently, only ports for Forge 1.20.1 and NeoForge 1.21.1 are planned.)
Since version 1.2.0+, this mod introduces high-concurrency loading to improve startup speed. If you encounter any issues while using this mod, please try disabling the related option in the configuration file.
How to install LightSpeedRe - Launch optimizations
With Millida Launcher
Install Millida Launcher
The launcher is free: download it at millida.net/launcher and sign in with any nickname.
Click “Install” on this page
The launcher opens and installs the mod for Minecraft 1.20.1–1.21.1 on Forge or NeoForge automatically.
Launch the game
A profile with it appears in the launcher: click “Play”.
Manually
Install Forge or NeoForge
The loader must match the game version of the mod file, for example Minecraft 1.21.1. After installing it, a separate profile appears in your launcher.
Download the file for your version
In the version list above, pick the file lightspeed-1.21.1-1.2.3.jar (78 KB) for your game version and loader.
Put it in the mods folder
The folder is inside .minecraft (Windows: %appdata%\.minecraft\mods). If it does not exist, create it.
Launch the loader profile
Open “Mods” in the main menu: LightSpeedRe - Launch optimizations should be in the list.
Minecraft 1.21.1 runs on Java 21: with a different Java version the game may close right after launch.
Versions
With dependencies
| Minecraft | Loader | File | Date | Actions |
|---|---|---|---|---|
| 1.21.1 | NeoForge | lightspeed-1.21.1-1.2.3.jar78.2 KB 8 | ||
| 1.20.1 | Forge | lightspeed-1.20.1-1.2.3.jar236 KB 11 |
FAQ
Which Minecraft versions does LightSpeedRe - Launch optimizations work on?
There are files for 1.21.1, 1.20.1. The newest is 1.21.1.
Is LightSpeedRe - Launch optimizations for Forge or Fabric?
There are files for Forge: 1.20.1 and for NeoForge: 1.21.1. There are no files for Fabric: a mod for another loader will not start.
Does LightSpeedRe - Launch optimizations need other mods?
The author lists no required dependencies: the Forge or NeoForge loader is enough.
Which Java does LightSpeedRe - Launch optimizations need?
Minecraft 1.21.1 runs on Java 21. If the game closes right after launch, the usual cause is the wrong Java version in the profile settings.
Where can I download LightSpeedRe - Launch optimizations safely?
On this page: the file lightspeed-1.21.1-1.2.3.jar (78 KB) is stored on Millida’s server, with no link shorteners. SHA-1 checksum: 1b8e908326e9777d0c9865834dc357a8354f367c.
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