In general I would suggest you to go through the Degraded Performance and the Tips and Tricks help articles suggesting on how you could improve the performance.
I hope this helps.
TRY TELERIK'S NEWEST PRODUCT - EQATEC APPLICATION ANALYTICS for WPF.
Learn what features your users use (or don't use) in your application. Know your audience. Target it better. Develop wisely.
Sign up for Free application insights >>