.net core SIMD范例分析

using System;
using System.Collections.Generic;
using System.Linq;
using System.Numerics;
using System.Diagnostics;
using System.Text;
using System.Threading.Tasks;

namespace MySIMDTest
{
    class Program
    {
        static Random rand = new Random();
        static Vector<int> getVec32(int count)
        {
            var lst = new List<int>(count);
            for (int i = 0; i < count; ++i) lst.Add(rand.Next(100));
            return new Vector<int>(lst.ToArray());
        }

        static Vector<short> getVec16(int count)
        {
            var lst = new List<int>(count);
            for (int i = 0; i < count; ++i) lst.Add(rand.Next(100));
            return new Vector<short>(lst.Select(i => (short)i).ToArray());
        }

        static void Main(string[] args)
        {
            var sw = new Stopwatch();
            var testTimes = (int)(Math.Pow(10, 5));
            var vecSize = (int)(Math.Pow(10, 2));

            Action testNormal = () =>
            {
                Console.Write("normal test ");
                var lstVecN1 = new List<Vector<int>>();
                var lstVecN2 = new List<Vector<int>>();
                for (int i = 0; i < testTimes; ++i)
                {
                    lstVecN1.Add(getVec32(vecSize));
                    lstVecN2.Add(getVec32(vecSize));
                }

                sw.Restart();
                for (int i = 0; i < testTimes; ++i)
                {
                    for(int j = 0; j < vecSize; ++j)
                    {
                        var r = lstVecN1[i] + lstVecN2[i];
                    }
                }
                sw.Stop();
                Console.WriteLine(sw.Elapsed);
            };

            Action test16 = () =>
            {
                Console.Write("16 test");
                var lstVecA1 = new List<Vector<short>>();
                var lstVecA2 = new List<Vector<short>>();
                for (int i = 0; i < testTimes; ++i)
                {
                    lstVecA1.Add(getVec16(vecSize));
                    lstVecA2.Add(getVec16(vecSize));
                }

                sw.Restart();
                for (int i = 0; i < testTimes; ++i)
                {
                    var result1 = lstVecA1[i] + lstVecA2[i];
                }
                sw.Stop();
                Console.WriteLine(sw.Elapsed);
            };


            Action test32 = () =>
            {
                Console.Write("32 test");
                var lstVecB1 = new List<Vector<int>>();
                var lstVecB2 = new List<Vector<int>>();
                for (int i = 0; i < testTimes; ++i)
                {
                    lstVecB1.Add(getVec32(vecSize));
                    lstVecB2.Add(getVec32(vecSize));
                }

                sw.Restart();
                for (int i = 0; i < testTimes; ++i)
                {
                    var result1 = lstVecB1[i] + lstVecB2[i];
                }
                sw.Stop();
                Console.WriteLine(sw.Elapsed);
            };

            for (int i = 0; i < 8; ++i) testNormal();
            for (int i = 0; i < 8; ++i) test32();
            for (int i = 0; i < 8; ++i) test16();
            Console.ReadKey();
        }
    }
}