Perfecto–a performance tool for ASP.NET applications

Not had a chance to try this out yet but this looks pretty interesting:

http://blogs.msdn.com/b/josere/archive/2010/04/09/taking-a-quick-peek-at-the-performance-of-your-asp-net-app.aspx

It takes advantage of the ETW infrastructure to give insight into why your ASP.NET application might be running slowly (if it is!).

HTH

Doug