LagProfiler

LagProfiler

This mod introduces a sleek, lightweight HUD overlay designed specifically to help players monitor their local game performance and diagnose client-side lag or stuttering in real-time.

by
30 Downloads
fabricmanagement
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Screenshots

LagProfiler Screenshot 1

About this Mod

HUD
This mod introduces a sleek, lightweight HUD overlay designed specifically to help players monitor their local game performance and diagnose client-side lag or stuttering in real-time.

Instead of relying on the cluttered F3 debug screen, this mod provides a clean UI that tracks exactly what is impacting your PC's performance and causing your game to drop frames.

Key Features:
Dynamic Stutter Detection (Status): Automatically monitors the client's processing time. If the local tick/frame time spikes above 50ms (which causes noticeable stuttering or freezing), the status instantly turns red and alerts you with "LAG DETECTED". Otherwise, it displays a green "STABLE" status.

Live Client Metrics: The HUD continuously tracks five crucial data points to help you pinpoint the source of your lag:

FPS: Your current Frames Per Second. Drops here indicate rendering struggles.

Tick Time: The exact duration of the client's processing cycle in milliseconds. High numbers mean your game is freezing or struggling to process data.

Entities: The total number of entities currently rendered around you. Useful for spotting lag caused by mob farms or dropped items.

Chunks/s: The rate at which your client is loading new map chunks. Fast flying or high render distances can cause this to spike and create lag.

RAM Usage: The current amount of memory (in MB) actively being consumed by the game. Perfect for identifying memory leaks or stuttering caused by Java Garbage Collection.

Quick Toggle & Customization: You can easily hide or show the entire UI at any time by pressing F7. If this conflicts with your other controls, the shortcut can be fully rebound to any key of your choice in the game's standard controls/keybinds menu.

Available Versions

LagProfiler 1.0.0release
MC 1.21.4, 1.21.5, 1.21.6, 1.21.7, 1.21.8, 1.21.9, 1.21.10, 1.21.11fabric
June 5, 2026

How to Install LagProfiler on Your Server

1

Order Server

Order a Minecraft Java server with at least 3 GB RAM (4 GB recommended).

2

Set fabric Loader

In the panel under "Egg", select the fabric loader and matching Minecraft version (1.21.11).

3

Install Mod

Open the mod browser in the dashboard and search for "LagProfiler". Click "Install" – done! Alternatively, upload the .jar via SFTP to the /mods folder.

Compatibility

Mod Loaders

fabric

Minecraft Versions

1.21.11, 1.21.10, 1.21.9 (+5 more)

Server-side

Unsupported

Recommended RAM

4 GB(min. 3 GB)

Frequently Asked Questions

LagProfiler server crashes on startup – what to do?

Most common cause: wrong fabric version or insufficient RAM. Check the server log (latest.log) for "OutOfMemoryError" or "Mixin" errors. With Mado Hosting: ensure at least 3 GB RAM is allocated and the loader matches the mod version (1.21.11). You can switch loaders with one click in the panel.

Is LagProfiler compatible with fabric?

LagProfiler officially supports fabric for Minecraft 1.21.11, 1.21.10, 1.21.9. The Mado dashboard automatically detects incompatible loader combinations.

Server lagging with LagProfiler – how to optimize performance?

Recommended RAM: 4 GB (per 8 players). Use /spark profiler to check if LagProfiler consumes the most tick time. Common fixes: reduce server view-distance to 8-10, install "performant" or "starlight" as supplementary mods on Forge. With Mado Hosting, your server runs on NVMe SSDs with dedicated CPU cores for minimal latency.

Rent Modded Server

Install LagProfiler with just one click on your server.

Recommended RAM
4 GBab €8/mo
Min. 3 GB | +1 GB pro 8 Spieler
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1-Click Mod Install
NVMe SSD Storage
DDoS Protection included

Details

License
MIT License
Server-side
Unsupported

Supported Versions

1.21.111.21.101.21.91.21.81.21.71.21.61.21.51.21.4