Bench Virtual Call vs Delegate Call

BenchVirtualVsDelegate.cs

// BenchmarkDotNet=v0.10.12, OS=Windows 10 Redstone 3 [1709, Fall Creators Update] (10.0.16299.248)
// Intel Core i7-4980HQ CPU 2.80GHz (Haswell), 1 CPU, 8 logical cores and 4 physical cores
// Frequency=2728070 Hz, Resolution=366.5595 ns, Timer=TSC
//   [Host]     : .NET Framework 4.6.1 (CLR 4.0.30319.42000), 64bit RyuJIT-v4.7.2633.0
//   DefaultJob : .NET Framework 4.6.1 (CLR 4.0.30319.42000), 64bit RyuJIT-v4.7.2633.0
// 
// 
//        Method |      Mean |     Error |    StdDev |
// ------------- |----------:|----------:|----------:|
//   VirtualCall | 0.9152 ns | 0.0393 ns | 0.0368 ns |
//  DelegateCall | 1.1955 ns | 0.0343 ns | 0.0321 ns |

using BenchmarkDotNet.Attributes;

namespace TestBenchmark
{
    public class BenchVirtualVsDelegate
    {
        private readonly ProcessorBase _processor;
        private readonly ProcessDelegate _processorDelegate;

        public delegate int ProcessDelegate(int a);

        public BenchVirtualVsDelegate()
        {
            _processor = new MyProcessor();
            _processorDelegate = i => i + 1;
        }

        [Benchmark]
        public int VirtualCall()
        {
            return _processor.Process(0);
        }

        [Benchmark]
        public int DelegateCall()
        {
            return _processorDelegate(0);
        }

        private abstract class ProcessorBase
        {
            public abstract int Process(int a);
        }

        private class MyProcessor : ProcessorBase
        {
            public override int Process(int a)
            {
                return a + 1;
            }
        }
    }
}