This is the second post of mine, which elaborates on how to implement drill down functionality in Telerik’s ASP.NET PivotGrid control. In the previous post I demonstrated how to display our Popup Dialog control containing a Telerik Grid with detailed information about the PivotGrid’s data cells. Today I will show you how to optimize the performance of the example provided in my previous post. The drill down demo from the first part is great, but it is not perfect. It has some weak parts and we can improve them. Here’s how.