Future.wait() vs Future.forEach()

future_bm.dart

void main() async {
  Stopwatch stopwatch = Stopwatch()..start();
  List<int> nums = [1, 2, 3, 4, 5];
  print(await usingForeach(nums));
  print('usingForeach() executed in ${stopwatch.elapsed}');

  // Reeset timer
  stopwatch.reset();

  print(await usingWait(nums));
  print('usingWait() executed in ${stopwatch.elapsed}');
}

Future<int> squareMyNumber(int number) async {
  // You can edit duration here
  await Future.delayed(Duration(seconds: 3));
  return number * number;
}

Future<List<int>> usingForeach(List<int> nums) async {
  List<int> squares = [];

  await Future.forEach(nums, (int no) async {
    int square = await squareMyNumber(no);
    squares.add(square);
    // print(square);
  });

  return squares;
}

Future<List<int>> usingWait(List<int> nums) async {
  List<int> squares;

  squares = await Future.wait(nums.map((int no) => squareMyNumber(no)));

  return squares;
}