I'm not sure if this is the right place to ask but maybe some of you might have any hints for me. I have an ajax enabled web page with a telerik RadComboBox and a VE map control on it. When I use the combo box to update the map an ajax request is performed. This request is quite slow (about 3s). First, I thought it might be a slow database connection but I found out (using System.Diagnostics.StopWatch) that the execution of the codebehind event handlers takes only 100ms while the whole ajax request takes 3s.
What could be the reason for that difference? Are there any means of improving the performance of an ajax request?