
If you have a PC with a older or lower end CPU (ex. CPUs with 8 or less threads), you may have noticed that Minecraft takes up 100% of the CPU when loading into the title screen, causing cursor stutter and makes multitasking painfully difficult. Smooth Boot Mod solves this problem completely, and loading should be much smoother and potentially faster as well. Optimize Minecraft loading performance to be smoother on low end systems and scale better on high end systems.

Minecraft uses executors to run multithreaded tasks. The problem is that the tasks that are ran during loading are quite heavy on the CPU, so it leads to 100% CPU usage. And, some of the tasks do not necessarily benefit from multithreading. Smooth Boot fixes these problems by change the parameters of the executors, including the number of threads they use and the priority of each thread.
The mod should be compatible with all mods including Optifine. However, it’s worth noting that the mod uses mixin overwrites on some methods used for loading the game.
Features:
- Change amount of threads used for loading.
- Change priority of threads used by Minecraft.
- Auto config menu to change config from in game.
Smooth Boot Mod Download Links
- Edition: Minecraft Java
- File type: .jar
- Minecraft versions listed: 1.21.1, 1.20.1
- 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: In MC Java Mods, or directly above on this page.
Install steps are the general flow for this file type — How to install Minecraft Java mods & modpacks walks through it step by step.
- Downloads as 27241.mcaddon
- Download size: 16 KB
- Download link checked 22 Sept 2026 — working
- Mirrored on our own servers — the download does not depend on the original host
These come from our own check of the pack file, not from the source page.