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Modrinth · Minecraft mod
LightSpeedRe
Reduces your waiting time by loading modpacks significantly faster (currently 48% - 71%)
Choose a version Pick your version below, then grab the matching file.
Quick answer
Which LightSpeedRe release should I use?
Latest stable file 1.20.1-1.2.3
Game version 1.20.1
Loader Forge
LightSpeedRe 1.20.1-1.2.3 targets 1.20.1 with Forge. It must be installed on the client. Do not install it on the dedicated server. No extra mods listed for this file.
Where it goes
Is LightSpeedRe required on the client, server, or both?
It must be installed on the client. Do not install it on the dedicated server.
Client Required
Dedicated server Not supported
Loader for this release Forge
Required install it here Optional supported, not mandatory Not supported do not install here Source doesn’t say do not assume
This file is marked client-only.
What else does LightSpeedRe 1.20.1-1.2.3 need?
1.20.1-1.2.3. Change the file and its required mods may change too.
This file does not list any required mods. Do not add a library just because a different file uses it.
This file does not list any required or optional mods.
Before you install it
Add LightSpeedRe without breaking your instance.
Built for LightSpeedRe 1.20.1-1.2.3. Pick another file and the loader, install side or required mods may change.
- 01
Stick to this file
Use 1.20.1-1.2.3. It targets 1.20.1 with Forge; another release may have different loader, side or dependency requirements.
- 02
Bring the mods it needs
This file does not list any required mods. Do not add a library just because a different file uses it.
- 03
Put it on the correct side
It must be installed on the client. Do not install it on the dedicated server.
- 04
Pick the file you checked
Use the “Get this file” button beside 1.20.1-1.2.3. It opens that exact file at the source.
About this project
What does LightSpeedRe add?
This is an unofficial 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.
Project description from Modrinth.
Pick your setup
LightSpeedRe by Minecraft version and loader
Choose the version and loader you play, then open the matching release.
Minecraft version
1.20.1
1 loader buildCheck the dependencies, then try the file in a copied instance before changing a world you care about.
Recent files
LightSpeedRe versions and loaders
1.20.1-1.2.3
lightspeed-1.20.1-1.2.3.jar
17 Aug 2026
Client Required Server Not supported Dependencies No extras listed Listed on Release listing
Check the 1.20.1 · Forge setup 1.20.1Forge release
1.21.1-1.2.3
lightspeed-1.21.1-1.2.3.jar
17 Aug 2026
Client Required Server Not supported Dependencies No extras listed Listed on Release listing
Check the 1.21.1 · NeoForge setup 1.21.1NeoForge release
1.21.1-1.2.2
lightspeed-1.21.1-1.2.2.jar
16 Aug 2026
Client Required Server Not supported Dependencies No extras listed Listed on Release listing
Check the 1.21.1 · NeoForge setup 1.21.1NeoForge release
1.20.1-1.2.2
lightspeed-1.20.1-1.2.2.jar
16 Aug 2026
Client Required Server Not supported Dependencies No extras listed Listed on Release listing
Check the 1.20.1 · Forge setup 1.20.1Forge release
1.21.1-1.2.1
lightspeed-1.21.1-1.2.1.jar
17 Jul 2026
Client Required Server Not supported Dependencies No extras listed Listed on Release listing
Check the 1.21.1 · NeoForge setup 1.21.1NeoForge release
1.21.1-1.2.0hotfix4
lightspeed-1.21.1-1.2.0hotfix4.jar
12 Jul 2026
Client Required Server Not supported Dependencies No extras listed Listed on Release listing
Check the 1.21.1 · NeoForge setup 1.21.1NeoForge release
1.21.1-1.2.0hotfix3
lightspeed-1.21.1-1.2.0hotfix3.jar
3 Jul 2026
Client Required Server Not supported Dependencies No extras listed Listed on Release listing
Check the 1.21.1 · NeoForge setup 1.21.1NeoForge release
1.21.1-1.2.0hotfix2
lightspeed-1.21.1-1.2.0hotfix2.jar
2 Jul 2026
Client Required Server Not supported Dependencies No extras listed Listed on Release listing
Check the 1.21.1 · NeoForge setup 1.21.1NeoForge release
1.20.1-1.2.0hotfix2
lightspeed-1.20.1-1.2.0hotfix2.jar
2 Jul 2026
Client Required Server Not supported Dependencies No extras listed Listed on Release listing
Check the 1.20.1 · Forge setup 1.20.1Forge release
1.21.1-1.2.0hotfix
lightspeed-1.21.1-1.2.0hotfix.jar
1 Jul 2026
Client Required Server Not supported Dependencies No extras listed Listed on Release listing
Check the 1.21.1 · NeoForge setup 1.21.1NeoForge release
1.20.1-1.2.0hotfix
lightspeed-1.20.1-1.2.0hotfix.jar
1 Jul 2026
Client Required Server Not supported Dependencies No extras listed Listed on Release listing
Check the 1.20.1 · Forge setup 1.20.1Forge release
1.21.1-1.2.0
lightspeed-1.21.1-1.2.0.jar
1 Jul 2026
Client Required Server Not supported Dependencies No extras listed Listed on Release listing
Check the 1.21.1 · NeoForge setup 1.21.1NeoForge release
Looking for an older file? The official Modrinth project page is in Resources.
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