We have developed our site using the Rad controls. Now we have some performance issues.
There are some slow pages because of both their size and the scripts running.
Also , when profiling with firebug, there is function createCallback, defined in multiple Telerik.Web.UI.WebResource.axd files that are being called a lot of times (88120, 80527, 288368,....). Is this normal ?
Also, please guide me to some performance related resources.