Max element count in WPF application for performance

Question

Hi,

In a WPF line of business application, at which point should I consider that the count of Elements, as seen in snoop, will noticebly hit performance.

In Advanced WPF Application Performance, the speaker looks at an application with ~6400 elements and says : fairly heavy but not necessarly unusual.

On my part I have an application with close to 15000 elements, and we are in the optimisation phase. But not sure if we need to focus on WPF since I heard elsewhere that WPF could handle a couple of thousands of elements.

Do you have any link / white papers on the subject ?

Thanks a lot,

Patrick