I had compare crystal report and Telerik report on rendering similar dataset. (LARGE dataset) Crystal report renders much faster on showing the initial page (viewer) by almost 50% compare to Telerik html5 viewer. (almost 10,000 pages) Crystal report renders much faster on generating PDF file by also 50%. Also Crystal report telling the total page on the initial rendered page., while on Telerik report (html5 viewer) it on shows pages that are already cache (and show caching progress.) It would be nice if it show the total pages then shows in the status notification the progress of caching.