In Visual Studio 2012 a horribly slow performance on MVC 4 website running in Azure Emulator

I experience in Visual Studio 2012 a horribly slow performance on MVC 4 website running in Azure Emulator. The symptoms

  • very slow response on your MVC 4 website with Azure webproject
  • timeouts
  • website often unresponsive
  • no difference in performance using SQLExpress, Local IIS Web server or Visual Studio Development Server
  • when pausing the webapp during waiting for page loading the stack with external code displays Microsoft.WindowsAzure.ServiceRuntime.DefaultEntryPoint.Run()
  • ERROR_WINHTTP_AUTODETECTION_FAILED (12180) in the Azure Compute Emulator

As usual it took many hours to figure everything out and it took me 5 seconds to apply the solution:

  • goto Internet Explorer
  • Tools
  • Internet Options
  • Connections
  • LAN Settings
  • uncheck “Automatically detect settings”

My site is now running 10-20 times faster and is always responsive now :-)

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