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POSystem.Net.WebClient unreasonably slow
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copied!<p>When using the <a href="http://msdn.microsoft.com/en-us/library/system.net.webclient(v=VS.100).aspx" rel="nofollow noreferrer">System.Net.WebClient.DownloadData()</a> method I'm getting an unreasonably slow response time.</p> <p>When fetching an url using the WebClient class in .NET it takes around 10 sec before I get a response, while the same page is fetched by my browser in under 1 sec. And this is with data that's 0.5kB or smaller in size.</p> <p>The request involves POST/GET parameters and a user agent header if perhaps that could cause problems.</p> <p>I haven't (yet) tried if other ways to download data in .NET gives me the same problems, but I'm suspecting I might get similar results. (I've always had a feeling web requests in .NET are unusually slow...)</p> <p>What could be the cause of this?</p> <p><strong>Edit:</strong> <br> I tried doing the exact thing using <code>System.Net.HttpWebRequest</code> instead, using the following method, and all requests finish in under 1 sec.</p> <pre><code>public static string DownloadText(string url) var request = (HttpWebRequest)WebRequest.Create(url); var response = (HttpWebResponse)request.GetResponse(); using (var reader = new StreamReader(response.GetResponseStream())) { return reader.ReadToEnd(); } } </code></pre> <p><br>While this (old) method using <code>System.Net.WebClient</code> takes 15-30s for each request to finish:</p> <pre><code>public static string DownloadText(string url) { var client = new WebClient(); byte[] data = client.DownloadData(url); return client.Encoding.GetString(data); } </code></pre>

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