StutterFix — Forge Port for Minecraft 1.20.1

Configures the main threads to reduce stuttering.

StutterFix lets you control thread priorities so chunk generation and world ticking stutter less — the render thread and server thread get dedicated priorities, and the render loop's yield() can be removed for more stable FPS. By default it ships with a sensible configuration.

Unofficial Forge port for Minecraft 1.20.1 — mechanism only, no GUI: configuration is edited in config/stutterfix-config.json.

What it does

• Render thread priority (default 10 on >4-core machines, else 5)
• Server thread priority (default 8, else 5)
• Optional remove-yield() in the render loop (renderRemoveYield)
• Config validated and clamped automatically

Port changes vs. the original

• In-game options GUI removed — JSON config only (this port's mechanism-only policy)

Installation

1. Install Forge 47.4.20 for Minecraft 1.20.1
2. Drop stutterfix-1.20.1-forge-*.jar into your mods folder

Original mod & credit

This is an unofficial Forge port by Itamio of StutterFix by wisecase2.

• Original mod: https://modrinth.com/mod/stutterfix
• Original source: https://github.com/wisecase2/StutterFix
• License: MIT (Copyright © 2023 wisecase2) — see LICENSE

All credit for the original concept, design, and logic goes to wisecase2. See NOTICE.