Performance of a Asp.Net Webforms application using WCF Service for getting data from a CMS

Which disadvantages / problems might occur, if all content from a ASP.Net WebForms application was receiv开发者_StackOverflow社区ed through a WCF service, rather than through a direct database call?

(Entity Framework 4.0 as provider, SQL Server 2008 R2 as database)

A scenario would be content from a CMS. Instead of using a library which calls the database directly, I'm thinking of a WCF service that wraps the calls to the library.

Has anyone any experience with this and can tell me something about the performance?

I have implemented several web applications where all the data is retrieved though WCF. There are no noticeable performance impacts as long as your service is implemented well.