Program.cs

class Program
    {
        static ActorSystem System;
        static int loop = 1000;
        static int maxParallel=100;//For Parallel Foreach
        static int taskload = 50;
    
        static void Main(string[] args)
        {
            
            System = ActorSystem.Create("system");
            foreach (var item in Enumerable.Range(0, loop))
            {
                System.ActorOf(Props.Create(() => new Actor()), $"{Guid.NewGuid()}");
            }
            var selection = System.ActorSelection("/user/*");
            
            /// Akka.net Actors
            var sw = Stopwatch.StartNew();
            selection.Ask(1).Wait();
            //var y = selection.Ask(1).Result;
            sw.Stop();
            Console.WriteLine(sw.ElapsedMilliseconds);

            var actorList = new List<FakeActor>();
            foreach (var item in Enumerable.Range(0, loop))
            {
                actorList.Add(new FakeActor());
            }
            
            /// Standard Foreach Clear Loser
            //sw.Restart();
            //foreach (var fakeActor in actorList)
            //{
            //    fakeActor.Ask(1);
            //}
            //sw.Stop();
            //Console.WriteLine(sw.ElapsedMilliseconds);
            
            ///Parallel Foreach with MaxParallel options
            sw.Restart();
            Parallel.ForEach(actorList, new ParallelOptions { MaxDegreeOfParallelism = maxParallel }, actor => actor.Ask(1));
            sw.Stop();
            Console.WriteLine(sw.ElapsedMilliseconds);

            ///Parallel Foreach without MaxParallel options
            sw.Restart();
            Parallel.ForEach(actorList, actor => actor.Ask(1));
            sw.Stop();
            Console.WriteLine(sw.ElapsedMilliseconds);
           
            Console.ReadLine();
        }
        public class FakeActor
        {
            public int Ask(int p)
            {
                Thread.Sleep(taskload);
                return p * 2;
            }
        }
        public class Actor : ReceiveActor
        {
            public Actor()
            {
                Receive<int>(p => { Thread.Sleep(taskload); Sender.Tell(p * 2); });
            }
        }
 }