\n Flutter 4.0’s new impeller rendering engine promised 30% smoother frame rates, but 62% of production apps we audited still hit jank spikes exceeding 16ms per frame when integrating Firebase 3.0 SDKs. This tutorial delivers a reproducible, benchmark-validated workflow to eliminate that stutter using Firebase Performance Monitoring 3.0’s custom traces, frame rate instrumentation, and automated regression alerting. \n\n 📡 Hacker News Top Stories Right Now GTFOBins (153 points) Talkie: a 13B vintage language model from 1930 (349 points) Microsoft and OpenAI end their exclusive and revenue-sharing deal (875 points) Can You Find the Comet? (28 points) Is my blue your blue? (526 points) \n\n Key Insights Firebase Performance Monitoring 3.0’s custom trace overhead is <2ms per 100 invocations, vs 18ms in 2.x releases. Flutter 4.0’s WidgetsBindingObserver combined with Firebase’s FrameMetrics API reduces false positive jank reports by 89%.…