Kas sa saad selgitada, mis on isolaatoreid programmeerimise kontekstis?

In Flutter, isolates are separate execution threads that do not share memory with the main thread. They allow performing heavy or long-running operations in parallel without blocking the UI. Each isolate has its own memory and communicates with others via message passing.

Example of creating an isolate:

import 'dart:isolate';

void heavyTask(SendPort sendPort) {
  // Perform a heavy operation
  int result = 0;
  for (int i = 0; i < 1000000; i++) {
    result += i;
  }
  sendPort.send(result);
}

void main() async {
  ReceivePort receivePort = ReceivePort();
  await Isolate.spawn(heavyTask, receivePort.sendPort);

  receivePort.listen((message) {
    print('Result from isolate: $message');
    receivePort.close();
  });
}

This way, isolates help efficiently utilize multithreading in Dart/Flutter and prevent issues with concurrent memory access.