flutter-concurrency

What problem does it solve?

It prevents UI jank by moving CPU-bound work such as large JSON parsing and heavy serialization off the Flutter main isolate into background execution contexts so the app can maintain smooth 60fps rendering.

Core Features & Use Cases

• Decision-driven Serialization: Guidance to choose between manual parsing and code-generation workflows (json_serializable) depending on model complexity and maintenance cost.
• Isolate-based Concurrency Patterns: Concrete options for short-lived tasks using Isolate.run, long-lived workers using ReceivePort/SendPort, and compute() fallbacks for Web.
• Platform-aware Constraints & Best Practices: Immutable message passing, avoidance of dart:ui in isolates, and integration patterns with UI state (e.g., FutureBuilder) for responsive lists and feeds.
• Use Case: Parse multi-megabyte API responses or large local JSON assets in the background and display typed model lists in the UI without frame drops.

Quick Start

Offload parsing of a large JSON payload to a background isolate using Isolate.run (or compute() on Web) and return typed model objects to the main isolate for UI consumption.