Mobile Monitor

Snap's Lens Studio just gave AR developers a powerful weapon against performance issues. If your lenses are failing submission due to slow activation or low FPS, this tool is your answer.

Snap released detailed documentation on their Lens Profiler, a microsecond-level performance analysis tool built on the open-source Perfetto framework. It helps developers diagnose why their AR lenses are slow to load or dropping frames during runtime.

Key Takeaways

• Records real device traces showing exactly what happens during lens activation and every frame
• Reveals hidden performance killers like disabled objects still loading at startup
• Uses Perfetto's open-source format, viewable in any compatible trace analysis tool
• Sorts performance slices by wall duration, self time, and occurrence count
• Identifies specific scene objects and scripts causing activation time failures

The case study examples show some surprising culprits that slow down lenses, even when they're not actively being used.