import 'dart:async'; Future myAsync(int a) async{ await Future.delayed(const Duration(seconds: 2)); return a; } void main(List arguments) async { var futureList = [myAsync(1), myAsync(2), myAsync(3)]; var start = DateTime.now(); var resList = await Future.wait(futureList); print('${resList.runtimeType}'); var end = DateTime.now(); print('run time = ${end.difference(start)}'); var sum = resList.r..