File streaming on HTTPS is slow

See more:

SSL

HTTPS

WebClient

I am using webclient to send file over https.

Below is my code.

public class WebClientEx : WebClient
   {

       protected override WebRequest GetWebRequest(Uri address)
       {

           HttpWebRequest request = (HttpWebRequest)base.GetWebRequest(address);

           request.ReadWriteTimeout = 2147483647;

           request.Timeout = 2147483647;

           request.SendChunked = true;

           request.AllowWriteStreamBuffering = false;
           request.ContentType = "application/octet-stream";
           // request.exnc = Encoding.UTF8;

           return request;

       }

   }

WebClientEx wc = new WebClientEx();

                      wc.UploadFileAsync(new Uri(@"https://www.exmaple.com/API/FileOperations/UploadFile.svc/UploadFileStream"), "POST", file);

My problem is with HTTPS, the file streaming is dead slow. Where as with HTTP its very fast. Please help. Urgent