Optimizing RadDatePicker Performance

Performance problems can be caused by using the picker in list controls. An example how to optimize this can be found here:

Maximum performance with minimum output using Telerik RadDatePicker client-side API

Also having many date pickers or time pickers on a page can render a lot of HTML and impact performance negatively. You can handle such scenarios by using a shared RadCalendar or RadTimeView. You can find more information and examples on the matter in Using shared RadCalendar.