Profile the client thread to get per frame data to indentify the cause of frame time lag spikes.
How it works:
- Run
/profile [seconds]to start the profiler for the specified duration. - The profiler result will be saved in the minecraft instance folder being named after the current time (
yyyy-MM-dd_HH-mm-ss.lagspikeprofile). - Load the profiler result using the LagSpikeProfiler Viewer.
Quick facts
- Edition: Minecraft Java
- File type: .jar
- Minecraft version listed: 1.12.2
- 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: Opens on Modrinth — not every file is mirrored on our own servers.
Install steps are the general flow for this file type — How to install Minecraft Java mods & modpacks walks through it step by step.
Verified by MCModsHub
- Ships as LagSpikeProfiler-1.12.2-1.1.4.jar — drop this file into the mods folder
- Download size: 85 KB
- Download link checked 9 Sept 2026 — working
These come from our own check of the pack file, not from the source page.