It will also fluctuate with network connection, oddly enough.
SubZ, it only uses one of two "threads" in hyperthreading, since it is not a multithreaded app. I did try running it with hyperthreading on, logging in as two different users and running two different copies of it at the same time. I found that running hyperthreading off and only one copy at a time is faster.
On the other hand, with my real dual proc machine, an old dual p3 850 box, it returned better results with two copies running.
