Profiling help in asp.net

Question

I am building a site using WebFormsMvp and Entity Framework 4.

The site is a bit slow and when i profile in dotTrace these three methods take 75% of the time. (My first method takes about 3%)

1. System.Threading.WaitHandle.InternalWaitOne(SafeHandle, Int64, Boolean, Boolean)
2. Microsoft.Samples.Runtime.Remoting.Channels.Pipe.PipeNative.ConnectNamedPipe(Int32, Overlapped)
3. Microsoft.Samples.Runtime.Remoting.Channels.Pipe.PipeNative.ReadFile(Int32, Byte[0..], UInt32, Byte[0..], UInt32)

Anyone seen these three before that should shine some light on what this might be? I've tried to track them down but cannot find anything useful. I know this is a really hard question to answer..

Answer 1

Those are all routines that block threads. What you need to know is why you are calling for that I/O. There is a very simple way to find out - stackshots. All you need is an IDE with a pause button.