It turns out that the impersonation message was a red herring (which I should have understood because it disappeared when disabling ASP.NET compatibility mode, while the request still took almost as much time). However, the WCF trace log did point me in the right direction: something very time consuming was obviously happening in WCF prior to the operation actually being invoked. Eventually, we found that the web application contained a user authentication/authorization class that, due to an improperly configured dependency injection container, was being invoked several times per request, causing many unnecessary database requests.
It could be your IIS Authisettings for your web site.
I cant really gove you an answer,but what I can give you is a way to a solution, that is you have to find the anglde that you relate to or peaks your interest. A good paper is one that people get drawn into because it reaches them ln some way.As for me WW11 to me, I think of the holocaust and the effect it had on the survivors, their families and those who stood by and did nothing until it was too late.