Stop Guessing Frame Drops: Passive Zero Overhead Performance Telemetry for Flutter

Short summary

jank_scout is a zero-overhead Flutter performance library that automatically detects frame drops and isolates rendering bottlenecks between UI (CPU) and Raster (GPU) threads. It compiles out entirely from production builds using assert boundaries. The post explains the architecture, walks through a real case study of synchronous JSON parsing freezing the UI thread, and provides a three-step integration guide with code examples.

• •Automatically detects Flutter frame drops and identifies whether bottleneck is UI thread (CPU) or Raster thread (GPU)
• •Zero production overhead through assert-based compilation optimization
• •Includes real-world case study and three-step integration guide

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