DuitDataSource: Why Maps Beat Objects in Widget-Heavy Frameworks

This optimization demonstrates that seemingly safer architectural choices—like replacing dynamic maps with typed classes—can create unexpected performance bottlenecks in hot paths. For BDUI frameworks handling frequent widget updates, especially during animations, the ability to reduce GC pressure and frame preparation time directly translates to smoother user experiences. The lesson extends beyond Duit: data representation decisions made early can have outsized effects on runtime performance, particularly in frameworks processing high-frequency updates.