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Bye?Pregen! project artwork

CurseForge · Minecraft mod

Bye?Pregen!

Reduce MSPT spikes and server freezes caused by chunk generation and speed it up.

Choose a version Pick your version below, then grab the matching file.

Quick answer

Which Bye?Pregen! release should I use?

Updated today
Latest stable file byepregen-1.21.1-1.1.2.3.jar
Game version 1.21.1
Loader NeoForge

Bye?Pregen! byepregen-1.21.1-1.1.2.3.jar targets 1.21.1 with NeoForge. The project page does not say whether this file belongs on the client, dedicated server, or both. No extra mods listed for this file.

Where it goes

Is Bye?Pregen! required on the client, server, or both?

The project page does not say whether this file belongs on the client, dedicated server, or both.

Client Source doesn’t say
Dedicated server Source doesn’t say
Loader for this release NeoForge
Required install it here Optional supported, not mandatory Not supported do not install here Source doesn’t say do not assume

The source does not explicitly classify this release as client-only or server-only.

Understand client and server requirements Read the Minecraft installation guide

What else does Bye?Pregen! byepregen-1.21.1-1.1.2.3.jar need?

byepregen-1.21.1-1.1.2.3.jar. Change the file and its required mods may change too.

No extra mods listed for this file

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 Bye?Pregen! without breaking your instance.

Built for Bye?Pregen! byepregen-1.21.1-1.1.2.3.jar. Pick another file and the loader, install side or required mods may change.

  1. 01

    Stick to this file

    Use byepregen-1.21.1-1.1.2.3.jar. It targets 1.21.1 with NeoForge; another release may have different loader, side or dependency requirements.

  2. 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.

  3. 03

    Put it on the correct side

    The project page does not say whether this file belongs on the client, dedicated server, or both.

  4. 04

    Pick the file you checked

    Use the “Get this file” button beside byepregen-1.21.1-1.1.2.3.jar. It opens that exact file at the source.

About this project

What does Bye?Pregen! add?

ByePregen is a performance optimization mod for Minecraft world generation, optimizing block placement and memory allocations, and introducing compiled execution for Density Functions and Surface Rules, alongside other world-generation optimizations.

Compatibility

Compatible with: C2ME, FastNoise
Incompatible with: Noisium, AntiXRay

Notice: If you are using RTF mod, do NOT install Byepregen and FastNoise together. Please choose only one of them.

Performance

  • ~50% lower average exploration lag (MSPT) on vanilla
  • 30–70% lower generation-related MSPT across heavily modded modpacks
  • Up to +95.2% chunk-generation throughput with Tectonic + WWOO
  • Fewer and shorter server freezes during exploration

Project description from CurseForge.

Pick your setup

Bye?Pregen! by Minecraft version and loader

Choose the version and loader you play, then open the matching release.

4 available setups

Check the dependencies, then try the file in a copied instance before changing a world you care about.

Recent files

Bye?Pregen! versions and loaders

32 of 32 releases match

Looking for an older file? The official CurseForge project page is in Resources.

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