WCF Rest服务 - 流式下载非常慢。 [英] WCF Rest service - streaming download is VERY slow.

问题描述

你好WCF好友，我有一个大问题。



我正在尝试使用REST WCF下载文件，但看起来，例如，16MB文件花了我56秒，但在常规下载（相同的来源 - 来自我们的网站） - 需要8秒。



在客户端，我正在阅读这样的块：

  //  初始化 
 HttpWebRequest request =（HttpWebRequest）WebRequest.Create（test.FullURL）; 
 request.Method = test.Method.ToString（）; 
  if （test.Method！= TestMethod.GET）
 {
 request.ContentType =   application / json; 
 使用（Stream requestStream = request.GetRequestStream（））
 {
  byte  [] inputStringBytes = Encoding.UTF8.GetBytes（test.InputData）; 
 requestStream.Write（inputStringBytes， 0 ，inputStringBytes.Length）; 
} 
} 
 使用（ var  response = request.GetResponse （））
 {
 使用（Stream responseStream = response.GetResponseStream（））
 {
 System.Diagnostics。秒表watch =  new  System.Diagnostics.Stopwatch（）; 
 
  char  [] btArray =  new   char  [ 5242880 ]; 
 watch.Start（）; 
 StreamReader rdr =  new  StreamReader（responseStream，Encoding.UTF8）; 
 
  int  idx =  0 ; 
  int  length =  0 ; 
  while （！rdr.EndOfStream）
 {
 idx = rdr.ReadBlock（btArray， 0 ， 5242880 ）; 
  //   _ result.actual + = new string（btArray，0，idx）;  
} 
 watch.Stop（）; 
 Console.WriteLine（watch.Elapsed）; 
 
} 
} 

我使用的是5MB块，文件是16MB，因为我说。





配置是基本的：

 <   service     behaviorConfiguration   =  httpBehavior   名称  = 名称 >  
 <   endpoint    地址  =     binding   =  webHttpBinding    bindingConfiguration   =  webHttpBindingConfig      behaviorConfiguration   =  web   合同  =  IService    /  >  
 <   / service  >  
 ... 
 ... 
 <   webHttpBinding  >  
 <   binding     name   =   webHttpBindingConfig    transferMode  < span class =code-keyword> = 流式    maxBufferSize   =  52428800    maxReceivedMessageSize   =  52428800 >  
 <   readerQuotas     maxDepth   =  32     maxStringContentLength   = < span class =code-keyword> 52428800    maxArrayLength   =  52428800    maxBytesPerRead   =  52428800    maxNameTableCharCount   =  52428800  /  >  
 <  < span class =code-leadattribute> security     mode   = 运输 >  
 <   transport     clientCredentialType   =  无    proxyCredentialType   = 无   领域  =   /  >  
 <   / security  >  
 <   / binding  >  
 <   / webHttpBinding  >  

（我甚至在所有配置中都做了很多数字，看看是否有帮助 - 没什么）。



我错过了什么吗？



谢谢。

解决方案

检查这些

WCF优化和服务@高速 [ ^ ]

提升绩效的快速方法ASP.NET，WCF和Desktop Cl的可伸缩性客户 [ ^ ]



性能调优WCF服务，第1部分 [ ^ ]

性能调优WCF服务，第2部分 [ ^ ]

优化WCF Web服务性能 [ ^ ]



创建高性能WCF服务 [ ^ ]

WCF性能优化技巧 [ ^ ]

WCF优化和调整 [ ^ ]

WCF性能调整 [ ^ ]

Hello WCF Friends,i have a major problem.

i'm trying to download files using REST WCF, but it appears that, for example, 16MB file takes me 56 seconds, but in regular download (same source - from a website we have) - it takes 8 seconds.

In the client side, i'm reading the chunks like that:

// Initialize
HttpWebRequest request = (HttpWebRequest)WebRequest.Create(test.FullURL);
request.Method = test.Method.ToString();
if (test.Method != TestMethod.GET)
         {
            request.ContentType = "application/json";
            using (Stream requestStream = request.GetRequestStream())
            {
               byte[] inputStringBytes = Encoding.UTF8.GetBytes(test.InputData);
               requestStream.Write(inputStringBytes, 0, inputStringBytes.Length);
            }
         }
using (var response = request.GetResponse())
            {
               using (Stream responseStream = response.GetResponseStream())
               {
                    System.Diagnostics.Stopwatch watch = new System.Diagnostics.Stopwatch();

                    char[] btArray = new char[5242880];
                    watch.Start();
                     StreamReader rdr = new StreamReader(responseStream, Encoding.UTF8);
                     
                     int idx = 0;
                     int length = 0;
                     while (!rdr.EndOfStream)
                     {
                        idx = rdr.ReadBlock(btArray, 0, 5242880);
                        //_result.actual += new string(btArray, 0, idx);
                     }
                     watch.Stop();
                     Console.WriteLine(watch.Elapsed);
                 
               }
            }

I'm using 5MB chunks, the file is 16MB as i said.


the configuration is basiclly:

<service behaviorConfiguration="httpBehavior" name="Name">
        <endpoint address="" binding="webHttpBinding" bindingConfiguration="webHttpBindingConfig"  behaviorConfiguration="web" contract="IService" />
      </service>     
...
...
      <webHttpBinding>
        <binding name="webHttpBindingConfig" transferMode="Streamed" maxBufferSize="52428800" maxReceivedMessageSize="52428800">
          <readerQuotas maxDepth="32" maxStringContentLength="52428800" maxArrayLength="52428800" maxBytesPerRead="52428800" maxNameTableCharCount="52428800"/>
          <security mode="Transport">
            <transport clientCredentialType="None" proxyCredentialType="None" realm=""/>
          </security>
        </binding>
      </webHttpBinding>

(i even did large numbers in all configurations to see if that helps - nothing).

Am i missing something?

Thanks.

解决方案

Check these
WCF Optimization and Service @ High Speed[^]
Quick Ways to Boost Performance and Scalability of ASP.NET, WCF and Desktop Clients[^]

Performance Tuning WCF Services, Part 1[^]
Performance Tuning WCF Services, Part 2[^]
Optimizing WCF Web Service Performance[^]

Creating high performance WCF services[^]
WCF Performance Optimization Tips[^]
WCF Optimization and Tuning[^]
WCF Performance Tuning[^]

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