Why Drupal 7 takes too time in connecting to mysql db? - measured with xdebugger
This is a good group for you to join on groups.drupal.org
http://groups.drupal.org/drupal-windows

Looking at this post it sounds like the issue you are describing: http://groups.drupal.org/node/242443.


  Make sure that your Drupal settings.php connection string uses the IP
  address of your MySQL server (e.g. 127.0.0.1 for your local Windows
  machine), not 'localhost'.