optimize

Start by profiling with Flutter DevTools in profile mode to find bottlenecks in CPU, memory, and frame rendering. Then reduce widget rebuilds with const constructors and ListView.builder, replace O(n²) algorithms with Set or Map lookups, and run heavy work in parallel with Future.wait.

Use const constructors wherever possible so Flutter skips rebuilding identical widgets. Split large widgets so changing state only rebuilds the affected subtree, and use ListView.builder instead of ListView so only visible items are built.

Cancel stream subscriptions and dispose controllers in the dispose() method of every StatefulWidget. Avoid creating objects inside loops or build methods, reuse instances like DateFormat, and avoid holding references to objects no longer needed.

Use Future.wait to execute multiple independent futures concurrently instead of awaiting them sequentially. For repeated calls like search input, add a debounce Timer, and cache results in a Map to avoid redundant network requests.

Run flutter analyze with fatal warnings and the full flutter test suite after refactoring. Then launch the app in profile mode and use the performance overlay to confirm frame rendering stays under 16ms for 60fps.