测试获取网页的时间

using System;
 using System.Net;
 using System.IO;
 using System.Threading;
 using System.Timers;
 using System.Text.RegularExpressions;
 using System.Collections.Generic;
 using System.Text;
 using System.Runtime.InteropServices;
 using System.ComponentModel; namespace TestUrl
 {    internal class HiPerfTimer
     {
         [DllImport("Kernel32.dll")]
         private static extern bool QueryPerformanceCounter(
             out long lpPerformanceCount);         [DllImport("Kernel32.dll")]
         private static extern bool QueryPerformanceFrequency(
             out long lpFrequency);         private long startTime, stopTime;
         private long freq;         // Constructor
         public HiPerfTimer()
         {
             startTime = 0;
             stopTime = 0;             if (QueryPerformanceFrequency(out freq) == false)
             {
                 // high-performance counter not supported
                 throw new Win32Exception();
             }
         }         // Start the timer
         public void Start()
         {
             // lets do the waiting threads there work
             Thread.Sleep(0);             QueryPerformanceCounter(out startTime);
         }         // Stop the timer
         public void Stop()
         {
             QueryPerformanceCounter(out stopTime);
         }         // Returns the duration of the timer (in seconds)
         public double Duration
         {
             get
             {
                 return (double)(stopTime - startTime) / (double)freq;
             }
         }
     }    class Program
     {         static long rt = 0;
         static long wr = 0;         public static int PostData(string url, string data, out string info)
         {             info = "";
             CookieContainer cc = new CookieContainer();
             HttpWebRequest request = WebRequest.Create(url) as HttpWebRequest;
             request.CookieContainer = cc;
             request.Method = "POST";
             request.ContentType = "application/x-www-form-urlencoded";
             Stream requestStream = request.GetRequestStream();
             byte[] byteArray = Encoding.UTF8.GetBytes(data);
             requestStream.Write(byteArray, 0, byteArray.Length);
             requestStream.Close();
             HttpWebResponse response = request.GetResponse() as HttpWebResponse;
             Uri responseUri = response.ResponseUri;
             Stream receiveStream = response.GetResponseStream();
             Encoding encode = System.Text.Encoding.GetEncoding("utf-8");
             StreamReader readStream = new StreamReader(receiveStream, encode);
             string result = readStream.ReadToEnd();
             info = result;
             return 0;         }
         public static bool GetBool(string html)
         {             Regex regtable = new Regex(@"​​http://img.dotad.net/lg.gif​​​", RegexOptions.Singleline);
             Match ma = regtable.Match(html);
             if (ma.Success)
             {
                 return true;
             }
             else
                 return false;
         }         public static void ThreadProc()
         {             string info = "";
             string data = "";
             string url = "​http://203.86.46.53/lg/index.aspx​";
             long i=0;
             HiPerfTimer pt = new HiPerfTimer();     // create a new PerfTimer object
             pt.Start();                             // start the timer
             while (i++<100)
             {
               
                 PostData(url, data, out info);
                 //System.Console.WriteLine(info);
                 if (GetBool(info) == true)
                 {
                     rt++;