MethodCallingBenchmark.cs

using System;
using System.Runtime.CompilerServices;
using BenchmarkDotNet.Attributes;
using BenchmarkDotNet.Engines;
using NumSharp.Backends.Unmanaged;
using NumSharp.Memory.Pooling;
using NumSharp.Utilities;

namespace NumSharp.Benchmark.Unmanaged
{
    // RAN ON DEBUG BUILD
    //|              Method |     Mean |     Error |    StdDev |   Median |      Min |      Max | Ratio | RatioSD |
    //|-------------------- |---------:|----------:|----------:|---------:|---------:|---------:|------:|--------:|
    //|       Action_Method | 1.442 ms | 0.0725 ms | 0.9833 ms | 1.044 ms | 1.000 ms | 7.877 ms |  1.22 |    0.86 |
    //| Action_Method_stack | 1.161 ms | 0.0427 ms | 0.5789 ms | 1.008 ms | 1.000 ms | 7.042 ms |  0.98 |    0.51 |
    //|              Action | 1.083 ms | 0.0192 ms | 0.2605 ms | 1.009 ms | 1.000 ms | 5.455 ms |  0.91 |    0.24 |
    //|        Action_stack | 1.041 ms | 0.0153 ms | 0.2070 ms | 1.002 ms | 1.000 ms | 5.096 ms |  0.88 |    0.21 |
    //|              Method | 1.223 ms | 0.0250 ms | 0.3395 ms | 1.129 ms | 1.126 ms | 5.226 ms |  1.00 |    0.00 |
    // RAN ON RELEASE BUILD
    //|              Method |     Mean |     Error |    StdDev |   Median |      Min |      Max | Ratio | RatioSD |
    //|-------------------- |---------:|----------:|----------:|---------:|---------:|---------:|------:|--------:|
    //|       Action_Method | 1.145 ms | 0.0392 ms | 0.5317 ms | 1.005 ms | 1.000 ms | 7.531 ms |  0.97 |    0.48 |
    //| Action_Method_stack | 1.098 ms | 0.0292 ms | 0.3965 ms | 1.007 ms | 1.000 ms | 6.866 ms |  0.93 |    0.36 |
    //|              Action | 1.079 ms | 0.0256 ms | 0.3481 ms | 1.002 ms | 1.000 ms | 5.175 ms |  0.92 |    0.33 |
    //|        Action_stack | 1.046 ms | 0.0187 ms | 0.2538 ms | 1.002 ms | 1.000 ms | 5.601 ms |  0.89 |    0.26 |
    //|              Method | 1.233 ms | 0.0309 ms | 0.4196 ms | 1.127 ms | 1.099 ms | 5.282 ms |  1.00 |    0.00 |

    [SimpleJob(RunStrategy.ColdStart, warmupCount: 5, targetCount: 2000)]
    [MinColumn, MaxColumn, MeanColumn, MedianColumn]
    [HtmlExporter]
    public class NestingCalls
    {
        private Action action;
        private Action action_method;
        private int a;

        [GlobalSetup]
        public void Setup()
        {
            action = () => a = a + 1 - 1;
            action_method = method;
        }

        [MethodImpl(MethodImplOptions.NoInlining)]
        void method()
        {
            a = a + 1 - 1;
        }


        [Benchmark]
        public void Action_Method()
        {
            for (int i = 0; i < 500_000; i++)
            {
                action_method();
            }
        }


        [Benchmark]
        public void Action_Method_stack()
        {
            var stackvar = action_method;
            for (int i = 0; i < 500_000; i++)
            {
                stackvar();
            }
        }


        [Benchmark]
        public void Action()
        {
            for (int i = 0; i < 500_000; i++)
            {
                action();
            }
        }


        [Benchmark]
        public void Action_stack()
        {
            var stackvar = action;
            for (int i = 0; i < 500_000; i++)
            {
                stackvar();
            }
        }

        [Benchmark(Baseline = true)]
        public void Method()
        {
            for (int i = 0; i < 500_000; i++)
            {
                method();
            }
        }
    }
}