added IActorRef benchmarks

src/benchmark/Akka.Benchmarks/Actor/ActorRefBenchmarks.cs

@@ -0,0 +1,67 @@
+// //-----------------------------------------------------------------------
+// // <copyright file="ActorRefBenchmarks.cs" company="Akka.NET Project">
+// //     Copyright (C) 2009-2021 Lightbend Inc. <http://www.lightbend.com>
+// //     Copyright (C) 2013-2021 .NET Foundation <https://github.com/akkadotnet/akka.net>
+// // </copyright>
+// //-----------------------------------------------------------------------
+
+using System;
+using System.Threading.Tasks;
+using Akka.Actor;
+using Akka.Benchmarks.Configurations;
+using BenchmarkDotNet.Attributes;
+
+namespace Akka.Benchmarks.Actor
+{
+    [Config(typeof(MicroBenchmarkConfig))] // need memory diagnosis
+    public class ActorRefBenchmarks
+    {
+        [Params(10000)]
+        public int Iterations { get; set; }
+        private TimeSpan _timeout;
+        private ActorSystem _system;
+        private IActorRef _echo;
+        private IActorRef _echo2;
+
+        [GlobalSetup]
+        public void Setup()
+        {
+            _timeout = TimeSpan.FromMinutes(1);
+            _system = ActorSystem.Create("system");
+            _echo = _system.ActorOf(Props.Create(() => new EchoActor()), "echo");
+            _echo2 = _system.ActorOf(Props.Create(() => new EchoActor()), "echo2");
+        }
+
+        [Benchmark]
+        public int ActorRefGetHashCode()
+        {
+            return _echo.GetHashCode();
+        }
+
+        [Benchmark]
+        public bool ActorRefEqualsSelf()
+        {
+            return _echo.Equals(_echo);
+        }
+
+        [Benchmark]
+        public bool ActorRefEqualsSomeoneElse()
+        {
+            return _echo.Equals(_echo2);
+        }
+
+        [GlobalCleanup]
+        public void Cleanup()
+        {
+            _system.Terminate().Wait();
+        }
+
+        public class EchoActor : UntypedActor
+        {
+            protected override void OnReceive(object message)
+            {
+                Sender.Tell(message);
+            }
+        }
+    }
+}