Dart Async Guide: Future, Stream, and Isolate — When to Use Each

Dart Async Guide: Future, Stream, and Isolate — When to Use Each Dart's async model has three layers. Understanding which to reach for — and when — is what keeps Flutter apps responsive. Why Async Matters // ❌ BAD: synchronous call blocks the UI void fetchData () { final data = http . get ( 'https://api.example.com/data' ); // 2s wait // UI freezes for 2 seconds } // ✅ GOOD: async keeps the UI responsive Future void > fetchData () async { final data = await http . get ( 'https://api.example.com/