Linq的学习之路-1

Stopwatch sw = new Stopwatch(); Stopwatch sw2 = new Stopwatch(); var list = new List<Person>(); for (int i = 0; i < 2000000; i++) { list.Add(new Person(i.ToString() + "名", "中国", i)); } for (int i = 0; i < 2000000; i++) { list.Add(new Person(i.ToString() + "名", "法国", i)); } sw.Start(); var cnums = list.AsParallel().Where(p => p.Address == "中国").Count(); sw.Stop(); sw2.Start(); var cnums2 = list.Where(p => p.Address == "中国").Count(); sw2.Stop(); Console.WriteLine("[para方法]查找结果:" + cnums + " 共用时:" + sw.Elapsed.TotalMilliseconds); Console.WriteLine("[非para方法]查找结果:" + cnums2 + "共用时:" + sw2.Elapsed.TotalMilliseconds); Console.Read();