FPS, Frametime & Benchmarking
Performance Overlay is a lightweight, client-side mod that shows what actually matters for smooth gameplay — not just average FPS.
It focuses on 1% / 0.1% lows, frametime stability, stutters, and frame spikes, helping you understand why Minecraft feels smooth or laggy.
📊 Performance Metrics
The overlay updates in real time and displays:
- FPS (average)
- 1% low FPS
- 0.1% low FPS
- Frametime
- Stutter count
- Worst frame spike
- GC pauses
- Memory usage
All metrics are designed for real performance analysis, not vanity numbers.
⌨️ Key Bindings
All features are accessible instantly via key binds:
- F7 — Toggle performance overlay
- F8 — Cycle overlay layout
- F9 — Reset performance statistics
- F10 — Start / stop benchmark
Key bindings can be changed in Minecraft → Controls.
🧩 Customisation
- Multiple overlay layouts
- Different screen positions
- Minimal and non-intrusive design
- Instant toggling without menus
🧪 Benchmark Mode
Run objective benchmarks and get detailed CSV results, including:
- Per-frame FPS and frametime data
- Average FPS, 1% / 0.1% lows
- Worst stutters and frame spikes
- Run metadata for comparison
📁 Files are saved to: .minecraft/config/performanceoverlay/benchmarks/
CSV files can be opened in Excel, Google Sheets, or any analysis tool as well as AI chats.
🎯 Use Cases
- Diagnosing stutters and micro-freezes
- Comparing shaders, mods, modpacks, or settings
- Measuring real smoothness instead of “feels smoother”
- Benchmarking performance changes reliably
ℹ️ Notes
- Client-side only
- Lightweight and low overhead
- No gameplay or logic changes
🔁 Redistribution
You are free to:
- Use this mod in modpacks (public or private)
- Include it in custom client setups
- Fork or modify the code for your own needs
If you re-upload this mod (modified or unmodified), please:
- Credit Performance Overlay as the original project
- Link back to this Modrinth page
- Use a different name and icon for modified versions
License
MIT License
How to Install Performance Overlay (Mod)
Performance Overlay by itsgeorge is verified for Fabric across Minecraft versions 1.21, 1.21.1, 1.21.10, 1.21.11, 1.21.2, 1.21.3, 1.21.4, 1.21.5 (latest release: 1.0.2+mc26.2-fabric, file size: 184 KB). Follow the steps below to install it safely from ModCraft.tv:
- Click the Download button above and select your Minecraft version (1.21, 1.21.1, 1.21.10, 1.21.11, 1.21.2, 1.21.3, 1.21.4, 1.21.5) and platform (Fabric).
- Make sure you have the compatible loader or environment installed for Fabric.
- Move the downloaded Performance Overlay file into your Minecraft
.minecraft/modsfolder and launch the game.
All Versions
+ Add Version
- Initial release for Minecraft 26.2.
- Feature-equivalent to Performance Overlay 1.0.2 for Minecraft 1.21.9–1.21.11.
- Initial release for Minecraft 26.1, 26.1.1, and 26.1.2.
- Feature-equivalent to Performance Overlay 1.0.2 for Minecraft 1.21.9–1.21.11.
- Improved benchmark accuracy and made exported metrics independent of overlay visibility.
- Moved CSV writing off the render path to reduce benchmark overhead.
- Fixed benchmark stopping, shutdown, world-leaving, filename collision, and write-error handling.
- Fixed GC reporting, reset behavior, and CSV values.
- Fixed configuration presets, validation, color thresholds, tooltips, and saved settings.
- Fixed benchmark progress, F9/F10 behavior, and three-line overlay formatting.
- Improved low-FPS, stutter, and overlay-rendering performance.
- Added extensive automated tests for metrics, configuration, CSV export, and benchmark lifecycle.
- Corrected supported Minecraft versions to 1.21.9–1.21.11.
- Confirmed compatibility with Minecraft 1.21.9, 1.21.10, and 1.21.11.
- Minecraft 1.21.8 is no longer listed as supported.
- Real-time FPS and frametime overlay.
- Average FPS, 1% and 0.1% low metrics.
- GC pause detection and memory usage tracking.
- Stutter detection and worst frame spike tracking.
- Built-in benchmark mode with TSV exports.
- Configurable overlay layout and keybindings.
