如何加快速度 [英] How to speed this up

问题描述

大家好，这是我上周发布的一个问题的后续内容 - 以下代码在我的本地局域网上发现了一个媒体服务器，它可以工作但速度非常慢，我想知道如何加速它或者以不同的方式执行

Hi all, this is a follow on from a question I posted last week - the following code discovers a media server on my local lan , it works but is very slow and I would like some advice as to how I can either speed it up or do it differently

void ScanForServer()
        {
            IPEndPoint ReceiveIP = null;
            UdpClient listener = null;
            Byte[] RequestData = null;
            byte[] BytesReceived = null;

            int UDPPort = 3483;

            try
            {
                ReceiveIP = new IPEndPoint(IPAddress.Any, UDPPort);
                listener = new UdpClient(this.UDPPort);
         
                // RequestData will contain a server request in the correct format
                // ReceivIP will contain the ip address of a discovered server.
                RequestData = listener.Receive(ref ReceiveIP);
                
                // Which I then send back as a request
                listener.Send(RequestData, RequestData.Length, ReceiveIP);
                // This will return server information such as the tcp port.
                BytesReceived = listener.Receive(ref ReceiveIP);
             }
            catch (Exception ex)
            {
                MessageBox.Show(ex.Message);
            }
            finally
            {
                if (listener != null && listener.Client.Connected)
                    listener.Close();
            }
        }

因为我说它工作得很好但很慢（可能是30秒左右） ）

as I say it works perfectly but is VERY SLOW ( can be 30 seconds or so )

推荐答案

正如戴夫所说：你的代码正在等待响应，而且无法加速。

然而，它可能会值得使用秒表类来准确计算出它的进展情况：

As Dave says: your code is waiting for responses, and that can't be speed up.
However, it might be worth using the Stopwatch class to work out exactly where it is going slowly:

void ScanForServer()
    {
    IPEndPoint ReceiveIP = null;
    UdpClient listener = null;
    Byte[] RequestData = null;
    byte[] BytesReceived = null;
    int UDPPort = 3483;
    Stopwatch s1 = new Stopwatch();
    Stopwatch s2 = new Stopwatch();
    Stopwatch s3 = new Stopwatch();
    Stopwatch s4 = new Stopwatch();
    Stopwatch s5 = new Stopwatch();
    Stopwatch s6 = new Stopwatch();
    try
        {
        s1.Start();
        ReceiveIP = new IPEndPoint(IPAddress.Any, UDPPort);
        s1.Stop();
        s2.Start();
        listener = new UdpClient(this.UDPPort);
        s2.Stop();
        s3.Start();
        // RequestData will contain a server request in the correct format
        // ReceivIP will contain the ip address of a discovered server.
        RequestData = listener.Receive(ref ReceiveIP);
        s3.Stop();
        s4.Start();
        // Which I then send back as a request
        listener.Send(RequestData, RequestData.Length, ReceiveIP);
        s4.Stop();
        s5.Start();
        // This will return server information such as the tcp port.
        BytesReceived = listener.Receive(ref ReceiveIP);
        s5.Stop();
        }
    catch (Exception ex)
        {
        MessageBox.Show(ex.Message);
        }
    finally
        {
        s6.Start();
        if (listener != null && listener.Client.Connected)
            listener.Close();
        s6.Stop();
        }
    Console.WriteLine("{0}:{1}:{2}:{3}:{4}:{5}",
                        s1.ElapsedMilliseconds,
                        s2.ElapsedMilliseconds,
                        s3.ElapsedMilliseconds,
                        s4.ElapsedMilliseconds,
                        s5.ElapsedMilliseconds,
                        s6.ElapsedMilliseconds);
    }

您的代码中可能没有任何关于它的信息，但它可以帮助您了解哪个部分是迟缓的。

There probably isn't anything you can do about it in your code, but it may help you to know which part is sluggish.

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