mcmodwikiLag Detective
Lag Detective is a lightweight diagnostics mod that helps answer where the lag is coming from.
Build 1.0.0 · checked 14 August 2026
Guides
- Lag Detective: Bottleneck Classification and Support Reports
- Lag Detective: Real-Time Performance Dashboard and Metrics
Requires
| Mod | Needed | Versions |
|---|---|---|
fabric-api |
required | * |
Needs Java >=21.
Frequently Asked Questions
How do you open the Lag Detective graphical dashboard?
Type the command to launch the ui dashboard in chat to open the client performance interface.
How do you distinguish client FPS drops from server tick lag?
Inspect the dashboard to compare your Avg frame time against Server MSPT; high MSPT indicates server tick delays.
What does a Memory / GC stutter diagnosis mean?
It indicates periodic lag spikes caused by Java garbage collection pauses reclaiming system memory.
How can you share your performance diagnosis with server staff?
Use the Generate a support report action or command to create a summary, then click Copy report to paste it into support channels.
Download Links
- modrinth.com modrinth.com/mod/lagdetective