MMF 테스트

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.IO;
using System.Threading.Tasks;
using System.IO.MemoryMappedFiles;
using System.Diagnostics;

namespace MMFs {
    class Program {
        static void Main(string[] args) {
            int SIZE = 1000000;

            //Random rnd = new Random();
            //double[] rndv = new double[SIZE];
            //for(int i = 0; i < rndv.Length; i++) {
            //    rndv[i] = rnd.NextDouble() * 10000;
            //}
            //using(BinaryWriter swr = new BinaryWriter(new FileStream(@"c:\randomdata.data", FileMode.Create, FileAccess.Write))) {
            //    for(int i = 0; i < rndv.Length; i++) {
            //        swr.Write(rndv[i]);
            //    }
            //}

            double[] dbldata = new double[SIZE];
            MemoryMappedFile mmf = MemoryMappedFile.CreateFromFile(@"c:\randomdata.data");
            MemoryMappedViewAccessor access = mmf.CreateViewAccessor();
            int sizedbl = sizeof(double);
            int pos = 0;
            for(int i = 0; i < SIZE; i++) {
                double bucket = 0;
                access.Read<double>(pos, out bucket);
                pos += sizedbl;
                dbldata[i] = bucket;
            }

            Stopwatch sw = Stopwatch.StartNew();
            pos = 0;
            for(int i = 0; i < SIZE; i++) {
                double bucket = 0;
                access.Read<double>(pos, out bucket);
                pos += sizedbl;
                dbldata[i] = bucket;
            }
            sw.Stop();
            Console.WriteLine(sw.ElapsedMilliseconds + ", " + (1000 * 60) / sw.ElapsedMilliseconds);
            Console.ReadLine();
        }
    }
}