I am using Pythonpaste's webserver - does this only work on apache? httpunit looks interesting...

No, it's just HTTP. It just happens to come with apache, that's all.

Right. Here's a simple example:

ab -n 10000 -c 25 http://your.com/your.py

10000 hits, with 25 concurrent requests. You can keep cranking up -c n and see what happens. This is also useful for testing your network capability, e.g. simultaneous connections, from a fast remote network.

Thanks, I am using Siege which does this and a bit.. If i am going to learn anything new then httpunit it is.