Sprintum

UPDATE 22.01.2025

Mojang has officially reverted this bug, so this modification ensures the proper functioning of Minecraft 1.21.4 core features according to the original design intent.

Sprintum is a specialized Minecraft add-on that restores the original sprint system behavior by canceling the official patch for bug [MC-152728]. This mod guarantees the ability to continue sprinting in situations where the game in standard mode forcibly stops this action.

Main Features

Return to Original Movement System

The modification completely restores the original sprint mechanics, allowing the player to maintain accelerated movement even when performing actions that would normally slow down the character.

Enhanced Elytra Flight

The particular value of Sprintum manifests when using Elytra - players can preserve sprint during flight, ensuring smooth and fast travel throughout the game world.

Local Modifications Without Server Interference

Notably, Sprintum makes changes only to the client side of the game, affecting exclusively the local shouldStopSprint check, and does not impact server-side movement mechanics.

Lightweight Architecture

The mod features minimal changes to the game code, ensuring compatibility with other modifications and Minecraft versions without disrupting core game mechanics.

Technical Foundation

The standard Minecraft version contains a specific check:

public class LocalPlayer extends AbstractClientPlayer {
   ...
   public void aiStep() {
      ...
      if (this.shouldStopSprinting()) {
         this.setSprinting(false);
      }
      ...
   }
}

Sprintum modifies the shouldStopSprint() function, forcing it to consistently return false, which allows maintaining the sprint state in virtually all game situations.

Progressive Approach to Game Balance

It's important to emphasize that Sprintum is not a cheating solution or exploit modification. It simply eliminates an excessive client-side restriction that prevents sprinting during certain actions. All server-side speed verification mechanisms remain fully intact, excluding any unfair advantage in multiplayer modes.

Supported Game Actions

The mod restores sprint behavior for the following situations:

• Sneaking movement
• Crawling
• Eating or drinking
• Using spyglass
• Shield blocking
• Drawing bow or crossbow
• Preparing to throw trident
• Using goat horn
• Flight using Elytra

With Sprintum, you can maintain sprint speed during the listed actions, which is particularly valuable when flying with Elytra, where continuous acceleration has the greatest impact on game dynamics and travel convenience.