flutter-handling-concurrency

Offload CPU-intensive tasks to background isolates while keeping Flutter UIs responsive. Dart utilizes a single-threaded execution model driven by an Event Loop (comparable to the iOS main loop). By default, all Flutter application code runs on the Main Isolate. Apply the following conditional logic to determine the correct concurrency approach: Use this workflow to fetch and display non-blocking asynchronous data. Task Progress: Use this workflow for one-off, CPU-intensive tasks using Dart 2.19+. Task Progress: Use this workflow for persistent background processes requiring continuous bidirectional communication. Task Progress: - Provides three concurrency patterns: async / await for I/O-bound work, Isolate.run() for one-off heavy computations, and Isolate.spawn() with message passing for persistent background workers - Includes a decision matrix to choose between async operations and isolates based on task type (I/O vs. CPU-bound) and execution frequency - Covers three complete workflows with step-by-step task checklists: standard async UI with FutureBuilder , short-lived isolate offloading, and long-lived bidirectional worker communication - Provides three runnable code examples demonstrating FutureBuilder patterns, JSON decoding in isolates, and ReceivePort / SendPort message passing architecture - Core Concepts - Decision Matrix: Async vs.