Wiki 9Minecraft Wiki 9Minecraft

Smooth Boot Mod Wiki & Guide

Guides 4FAQ 20Related mods 60

A Minecraft performance mod that optimizes the game's startup process to reduce loading times and improve boot stability.

DownloadSmooth Boot Mod

Get the files on 9Minecraft

Contents (8)
  1. Overview
  2. Guides
  3. Configuration
  4. Other settings in this file
  5. Frequently asked questions
  6. Dependencies
  7. Gallery
  8. You May Also Like

Overview

Smooth Boot is a technical optimization mod designed to solve a common issue in Minecraft: extreme CPU usage during the game's startup sequence. On many systems, especially those with 8 or fewer threads, Minecraft's default loading process attempts to utilize 100% of the CPU. This results in "system hang," where the mouse cursor stutters, background applications (like web browsers or music players) lag, and the computer becomes nearly unresponsive until the title screen appears.

By tweaking how Java handles parallel execution, Smooth Boot allows the game to load more efficiently without starving the rest of the operating system of resources. It is particularly effective for players using large modpacks, which significantly extend loading times and CPU strain.

Guides

Step-by-step, in-game.

Checking Whether Smooth Boot Is Actually Improving Your Load TimesMeasuring Before and After To know if Smooth Boot is helping, you need a baseline. Launch the game with the mod…Fixing Smooth Boot Causing Crashes or Freezes During LoadingConfirming Smooth Boot Is the Cause If your game crashes or hangs while the loading screen is showing, Smooth Boot's…How to Configure Smooth Boot to Speed Up Minecraft StartupFinding the Config File Smooth Boot generates its config file in your Minecraft instance's config folder after the…Resolving Conflicts Between Smooth Boot and Other Performance ModsIdentifying a Conflict Conflicts usually show up as crashes during the loading screen, a frozen progress bar, or the…

Configuration

Every setting in the mod config file, with what it changes.

OptionWhat it does
threadCountSets how many worker threads the mod uses during startup
threadPrioritySets the scheduling priority of the mod's worker threads

Other settings in this file

7 more options the mod ships without its own description. Names are taken straight from the config file.

  • @Tooltip[1]Best left at 1.
  • bootstrapBootstrap Worker Thread Count
  • mainMain Worker Thread Count
  • @Tooltip[0]Note: Increasing is known to decrease performance.
  • gameGame Thread Priority
  • integratedServerIntegrated Server Thread Priority
  • ioIO Worker Priority

Frequently asked questions

How do I know if Smooth Boot is actually working?
Check your game log during startup for Smooth Boot's own timing or optimization messages, and compare the time from launch to the main menu with the mod enabled versus disabled. If startup feels the same and the log shows no Smooth Boot activity, it may not be loading at all.
Does Smooth Boot need to be configured or does it work out of the box?
It works with sensible defaults as soon as it's installed, so you don't have to touch anything to get the basic startup speedup. Configuration is only worth doing if you want to fine-tune thread usage or disable specific optimizations.
Why is my game still slow to load with Smooth Boot installed?
Smooth Boot only optimizes the startup process, so a slow load caused by a huge modpack, slow disk, or another mod's heavy initialization won't be fixed by it. Check your log for which mods take the longest to load, since those are usually the real bottleneck.
Can Smooth Boot break other mods?
It changes how the game's startup threads and loading are handled, which can occasionally conflict with other performance or optimization mods that touch the same process. If you get crashes or freezes during loading, try removing other startup-related performance mods first.

See all 20 Smooth Boot questions ›

Dependencies

Other mods needed to run this one.

Fabric (required)