Unrolling results

Program.cs

using System;
using System.Linq;
using System.Linq.Expressions;
using BenchmarkDotNet.Running;
using BenchmarkDotNet.Attributes;
using BenchmarkDotNet.Engines;

namespace UnrollBenchmark
{
    public class Bench
    {
        private Consumer consumerLocal;
        private Action delegateCombine;
        private Action lambdaExpression;

        [Setup]
        public void BencSetup()
        {
            consumerLocal = new Consumer();

            var mi = typeof(Bench).GetMethod(nameof(FuncToUnroll));
            Action func = FuncToUnroll;
            
            delegateCombine = (Action)Delegate.Combine(Enumerable.Repeat((Action)(object)func, 25).ToArray());

            var expr = Expression.Call(Expression.Constant(this), mi);
            var block = Expression.Block(Enumerable.Repeat(expr, 25));
            lambdaExpression = Expression.Lambda<Action>(block).Compile();
        }

        public void FuncToUnroll()
        {
            consumerLocal.Consume(DateTime.Now);
        }

        [Benchmark(Baseline = true)]
        public void UnrollBase()
        {
            FuncToUnroll();
            FuncToUnroll();
            FuncToUnroll();
            FuncToUnroll();
            FuncToUnroll();
            FuncToUnroll();
            FuncToUnroll();
            FuncToUnroll();
            FuncToUnroll();
            FuncToUnroll();
            FuncToUnroll();
            FuncToUnroll();
            FuncToUnroll();
            FuncToUnroll();
            FuncToUnroll();
            FuncToUnroll();
            FuncToUnroll();
            FuncToUnroll();
            FuncToUnroll();
            FuncToUnroll();
            FuncToUnroll();
            FuncToUnroll();
            FuncToUnroll();
            FuncToUnroll();
            FuncToUnroll();
        }

        [Benchmark]
        public void UnrollDelegate()
        {
            delegateCombine();
        }

        [Benchmark]
        public void UnrollExpression()
        {
            lambdaExpression();
        }
    }

    class Program
    {
        static void Main(string[] args)
        {
#if DEBUG
            Bench b = new Bench();
            b.BencSetup();
            b.FuncToUnroll();
            b.UnrollBase();
            b.UnrollDelegate();
            b.UnrollExpression();
#endif
            BenchmarkRunner.Run<Bench>();
        }
    }
}

results.md

BenchmarkDotNet=v0.10.3.0, OS=Microsoft Windows NT 6.2.9200.0
Processor=Intel(R) Core(TM) i7-6700 CPU 3.40GHz, ProcessorCount=8
Frequency=3328132 Hz, Resolution=300.4689 ns, Timer=TSC
  [Host]     : Clr 4.0.30319.42000, 32bit LegacyJIT-v4.6.1586.0
  DefaultJob : Clr 4.0.30319.42000, 32bit LegacyJIT-v4.6.1586.0

Method	Mean	StdDev	Scaled	Scaled-StdDev
UnrollBase	16.9955 us	0.0294 us	1.00	0.00
UnrollDelegate	17.0056 us	0.0194 us	1.00	0.00
UnrollExpression	17.1997 us	0.0130 us	1.01	0.00

BenchmarkDotNet=v0.10.3.20170330-develop, OS=Microsoft Windows NT 6.2.9200.0
Processor=Intel(R) Core(TM) i7-6500U CPU 2.50GHz, ProcessorCount=4
Frequency=2531245 Hz, Resolution=395.0625 ns, Timer=TSC
  [Host]     : Clr 4.0.30319.42000, 64bit RyuJIT-v4.6.1637.0
  AcerAspire : .NET Native 4.6.24903.00, 64bit RyuJIT
  Clr        : Clr 4.0.30319.42000, 64bit RyuJIT-v4.6.1637.0

Method	Job	Runtime	Mean	StdDev	Scaled	Scaled-StdDev
UnrollBase	AcerAspire	AcerAspire	8.7088 us	0.3321 us	1.00	0.00
UnrollDelegate	AcerAspire	AcerAspire	8.8792 us	0.1923 us	1.02	0.04
UnrollExpression	AcerAspire	AcerAspire	13.4516 us	0.6192 us	1.55	0.09
UnrollBase	Clr	Clr	6.9332 us	0.0914 us	1.00	0.00
UnrollDelegate	Clr	Clr	6.8973 us	0.0291 us	0.99	0.01
UnrollExpression	Clr	Clr	7.1989 us	0.0383 us	1.04	0.01