gistfile1.txt

using BenchmarkDotNet.Tasks;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;

namespace BenchmarkDotNet.Samples.JIT
{
    [BenchmarkTask(platform: BenchmarkPlatform.X64, jitVersion: BenchmarkJitVersion.RyuJit, warmupIterationCount: 1, targetIterationCount: 4, processCount: 1)]
    public class Jit_StructCopy
    {
        public struct S2
        {
            public long A1;
            public long A2;
        }

        public struct S4
        {
            public long A1;
            public long A2;
            public long A3;
            public long A4;
        }

        public struct S8
        {
            public long A1;
            public long A2;
            public long A3;
            public long A4;
            public long A5;
            public long A6;
            public long A7;
            public long A8;
        }

        private S2 src16;
        private S2 dest16;

        private S4 src32;
        private S4 dest32;

        private S8 src64;
        private S8 dest64;

        [Setup]
        public void Setup ()
        {
            src16 = new S2 { A1 = 23, A2 = 45 };
            src32 = new S4 { A1 = 23, A2 = 45, A3 = 311, A4 = 4122 };
            src64 = new S8 { A1 = 23, A2 = 45, A3 = 311, A4 = 4122, A5 = 23, A6 = 45, A7 = 311, A8 = 4122 };
        }

        [Benchmark]
        [OperationsPerInvoke(1)]
        public S2 CopyStruct16Bytes()
        {
            dest16 = src16;
            return dest16;
        }

        [Benchmark]
        [OperationsPerInvoke(1)]
        public S2 CopyProperties16Bytes()
        {
            dest16.A1 = src16.A1;
            dest16.A2 = src16.A2;
            return dest16;
        }

        [Benchmark]
        [OperationsPerInvoke(1)]
        public S4 CopyStruct32Bytes()
        {
            dest32 = src32;
            return dest32;
        }

        [Benchmark]
        [OperationsPerInvoke(1)]
        public S4 CopyProperties32Bytes()
        {
            dest32.A1 = src32.A1;
            dest32.A2 = src32.A2;
            dest32.A3 = src32.A3;
            dest32.A4 = src32.A4;
            return dest32;
        }

        [Benchmark]
        [OperationsPerInvoke(1)]
        public S8 CopyStruct64Bytes()
        {
            dest64 = src64;
            return dest64;
        }

        [Benchmark]
        [OperationsPerInvoke(1)]
        public S8 CopyProperties64Bytes()
        {
            dest64.A1 = src64.A1;
            dest64.A2 = src64.A2;
            dest64.A3 = src64.A3;
            dest64.A4 = src64.A4;
            dest64.A5 = src64.A5;
            dest64.A6 = src64.A6;
            dest64.A7 = src64.A7;
            dest64.A8 = src64.A8;
            return dest64;
        }

    }
}