worker_manager 6.0.0

The worker_manager allows you to manage CPU-intensive calculations across isolates

Worker Manager

Worker Manager is a powerful and easy-to-use library that helps you efficiently manage CPU-intensive tasks in your Flutter applications. It offers several advantages over traditional async programming or the built-in compute method.

Advantages

Efficient Scheduling

This library schedules CPU-intensive functions to avoid skipping frames or freezes in your Flutter application. It ensures that your app runs smoothly, even when dealing with heavy computations.

Reusable Isolates

Unlike the compute method, which always creates a new Dart isolate, Worker Manager reuses existing isolates. This approach is more efficient and prevents overloading the CPU. When resources are not freed up, using the compute method may cause freezes and skipped frames.

Cancelable Tasks

Worker Manager provides a cancellation functionality through the Cancelable class and its cancel method. This feature allows developers to free up resources when they are no longer needed, improving the app's performance and responsiveness.

Inter-Isolate Communication

The library supports communication between isolates with the executeWithPort method. This feature enables sending progress messages or other updates between isolates, providing more control over your tasks.

Usage

Execute the task

Cancelable<ResultType> cancelable = workerManager.execute<ResultType>(
  () async {
    // Your CPU-intensive function here
  },
  priority: WorkPriority.immediately,
);

Execute a Task with Inter-Isolate Communication

Cancelable<ResultType> cancelable = workerManager.executeWithPort<ResultType, MessageType>(
  (SendPort sendPort) async {
    // Your CPU-intensive function here
    // Use sendPort.send(message) to communicate with the main isolate
  },
  onMessage: (MessageType message) {
    // Handle the received message in the main isolate
  },
);

Cancel a Task

cancelable.cancel();

Dispose Worker Manager

await workerManager.dispose();

By using Worker Manager, you can enjoy the benefits of efficient task scheduling, reusable isolates, cancellable tasks, and inter-isolate communication. It provides a clear advantage over traditional async programming and the built-in compute method, ensuring that your Flutter applications remain performant and responsive even when handling CPU-intensive tasks.