Parallel and PLINQ: parallelplinq

Parallel and PLINQ: parallelplinq

Parallel is a simplified Task usage. It contains three static methods: Parallel. For, Parallel. ForEach, and Parallel. Invoke. PLINQ is a parallel version of LINQ. The following are simple examples and precautions for Parallel and PLINQ.

1. Simple Example 1. Parallel.

Int [] nums = new [] {1, 2, 3, 4}; Parallel. for (0, nums. length, I => {Console. writeLine ("subscript: {0}, value: {1}", I, nums [I]);});

2. Parallel. ForEach

Var ltModel = new List <UserInfo> (); for (int I = 1; I <= 5; I ++) {var item = new UserInfo {No = I, name = "Name" + I}; ltModel. add (item);} Parallel. forEach (ltModel, item => {Console. writeLine ("No: {0}, Name: {1}", item. no, item. name );});

3. Parallel. Invoke

Var ltTask = new List <Action> (); for (int I = 1; I <= 5; I ++) {int j = I; ltTask. add () => {Console. writeLine ("START task" + j) ;}) ;} Parallel. invoke (ltTask. toArray ());

4. PLINQ

            var ltNum = new List<int>() {1, 2, 3, 4, 5, 6, 7, 8, 9, 10};            var resultNum = (from n in ltNum.AsParallel() where n>=3 orderby n descending select n).ToArray();            foreach (var item in resultNum)            {                Console.WriteLine("Num: {0}", item);               }

Ii. Notes

If you have no requirements on the logical sequence of the set, you can use Parallel and PLINQ. Otherwise, they cannot be used.