#Isolates（隔离区）——Dart 的并发模型

import 'dart:isolate';

void heavyComputation(SendPort sendPort) {
  int sum = 0;
  for (int i = 0; i < 1000000000; i++) {
    sum += i;
  }
  sendPort.send(sum);
}

void main() async {
  ReceivePort receivePort = ReceivePort();
  
  await Isolate.spawn(heavyComputation, receivePort.sendPort);
  
  var result = await receivePort.first;
  print('结果：$result');
}

import 'package:flutter/foundation.dart';

int expensiveFunction(int value) {
  int result = 0;
  for (int i = 0; i < value; i++) {
    result += i;
  }
  return result;
}

void main() async {
  int result = await compute(expensiveFunction, 1000000);
  print('结果：$result');
}