Flutter Performance Optimization — Reduce Widget Rebuilds, Lazy Loading, and Memoization

Flutter Performance Optimization — Reduce Widget Rebuilds, Lazy Loading, and Memoization The three root causes of jank and how to fix each one. Cause 1: Unnecessary Widget Rebuilds // ❌ Bad: the whole parent rebuilds every time class ParentWidget extends StatelessWidget { @override Widget build ( BuildContext context ) { // All children rebuild every time return Column ( children: [ Text ( DateTime . now () . toString ()), // changes every second ExpensiveWidget (), // rebuilds every second → wa