Isolates & Parallel Computation

Isolates & Parallel Computation requires clear event-loop responsiveness, Future and Stream errors, subscription lifecycles, and isolate message boundaries. Use async for I/O and Isolate.run for CPU-heavy work.

Build a Complete Mental Model

Isolates & Parallel Computation requires clear event-loop responsiveness, Future and Stream errors, subscription lifecycles, and isolate message boundaries. Use async for I/O and Isolate.run for CPU-heavy work.

Apply It in Modern Dart

Run and test an original Isolates & Parallel Computation example with null, empty, boundary, invalid, async-error, and cancellation cases. Use dart format, dart analyze, and dart test, and verify Future or Stream subscriptions and isolate boundaries where relevant.

After This Lesson

• Explain nullability, mutability, and async contracts
• Write an example that passes dart analyze
• Test a failure or async case

import 'dart:isolate';

int sumTo(int max) => List.generate(max, (i) => i + 1).fold(0, (a, b) => a + b);

Future<void> main() async {
  final result = await Isolate.run(() => sumTo(100));
  print(result);
}

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Concurrency in Dart — Dart