If if the request itself hasn't reached the network layer but is having a networky feeling hang, I'd look into DNS. It's network dependent but handled by the sy

If if the request itself hasn't reached the network layer but is having a networky feeling hang, I'd look into DNS. It's network dependent but handled by the system so it wouldn't show up in your web app requests. I'm sure there's a way to profile this directly but unless I had to do it all the time I'd probably just fire up wireshark.