A deep-dive comparison of how Android Views, Flutter, and Jetpack Compose each handle UI rendering when state changes. Android Views mutates a live object tree in place — efficient but prone to state-UI drift. Flutter rebuilds the entire widget tree on every state change, then diffs to patch only what changed — eliminating drift but introducing optimistic rebuild cost. Compose tracks fine-grained subscriptions to observable state, re-running only the exact composable scopes that read changed state — avoiding both drift and unnecessary rebuilds, but requiring developers to understand its stability contract. The article traces a single counter increment through all three pipelines, explains what failure each design prevents, what it costs, and when each framework is the right choice.
