WCF Performance

Thread pool throttling

http://blogs.msdn.com/b/wenlong/archive/2010/02/11/why-does-wcf-become-slow-after-being-idle-for-15-seconds.aspx

http://social.msdn.microsoft.com/Forums/en/wcf/thread/2dc57a71-6708-4a38-b7a9-8230fdd5675f

Antivirus slowdown

http://social.msdn.microsoft.com/Forums/en-NZ/wcf/thread/dc4a2ee7-fa3b-4ea5-9bf6-1bd6e141954f

Reliable Messaging

http://social.msdn.microsoft.com/Forums/en-US/wcf/thread/5f21fc60-cfe8-4a75-8284-84f414f5fb6c

http://stackoverflow.com/questions/13028717/wcf-is-slow-when-reliable-session-is-on-and-with-burst-async-request