The "100% Dart" Myth in Production Mobile Engineering

One of the most common architectural mistakes teams make when adopting Flutter is assuming that every feature should be written purely in Dart. While Flutter's rendering engine and pub.dev ecosystem handle 90% of standard CRUD and UI workflows effortlessly, forcing high-frequency hardware interactions—such as raw stylus ink prediction, custom WebRTC media tracks, or USB serial communication—through pure Dart abstractions often introduces unacceptable latency.

Where Pure Dart Hits a Bottleneck

In a recent interactive whiteboard project deployed on large Android touch panels, relying purely on standard Flutter gesture arenas resulted in a noticeable 70.7ms stylus stroke lag. Why?…