Improving performance of multithreaded HttpWebRequests in .NET

Question

I am trying to measure the throughput of a webservice.

In order to do that, I have written a small tool that continuously sends requests and reads responses from a n

Answer 1

Keep in mind multithreaded code can always cause contention on any shared resources and even if you're not explicitly sharing anything you might be using classes that are sharing resources under the covers.

If you are really getting better performance with 2 40 thread exes than 1 80 thread exe then you'll need to start your investigation with shared resources. And if that is the case, the code you cited is far less interesting than the code that creates and manages the threads.

The other thing I'd throw out there is there are several tools that you can get that will do this type of thing for you generically. See http://support.microsoft.com/kb/231282. Also included in Visual Studio (I'm not sure what skus) is a new generation of web application performance testing tools. And I'm sure if you looked you could find some non-MS stuff too.