.NET Delegate Invocation Performance Test

test.cs

/*
RESULTS ON 7960X
CORE 2.1
                Call 00:00:02.3531091
              Invoke 00:00:02.3209331
            Targeted 00:00:02.3206009
     Targeted Invoke 00:00:02.3417757

FRAMEWORK 4.7.2
                Call 00:00:02.3320065
              Invoke 00:00:02.0597758
            Targeted 00:00:02.0611660
     Targeted Invoke 00:00:02.0611159

*/
using System;
using System.Diagnostics;

namespace Sandbox
{
  class Program
  {
    static void Main(string[] args)
    {
      TestInvokePerformance();
    }

    private static void TestInvokePerformance()
    {
      const int iterations = 1_000_000_000;
      Action a = NOP;
      Func<int, int> b = NOP;
      Func<int, int> c = (Func<int, int>)Delegate.CreateDelegate(typeof(Func<int, int>), b.Target, b.Method);

      Time("Call", () =>
      {
        for (int i = 0; i < iterations; i++)
        b(1);
      });

      Time("Invoke", () =>
      {
        for (int i = 0; i < iterations; i++)
          b.Invoke(1);
      });

      Time("Targeted", () =>
      {
        for (int i = 0; i < iterations; i++)
          c(1);
      });

      Time("Targeted Invoke", () =>
      {
        for (int i = 0; i < iterations; i++)
          c.Invoke(1);
      });
    }

    private static void Write(string test, TimeSpan elapsed) => Console.WriteLine($"{test,20} {elapsed}");


    private static void Time(String test, Action action)
    {
      //Let's not time the JIT ;)
      action();
      Stopwatch sw = new Stopwatch();
      sw.Start();
      action();
      sw.Stop();
      Console.WriteLine($"{test,20} {sw.Elapsed}");
    }
    private static void NOP() => NOP(1); //Don't let the compiler optimize this call out because it's empty, so call another method.
    private static int NOP(int a) => a;
  }
}