And I would be happy to write it if I felt confident about some method of measuring memory use. I could use something like Process Explorer, but a dedicated utility would be handy, if you can think of one.
For this, honestly I'd start with something simple. So, right off, no. A script that just periodically dumps whatever ps or friends could give would be a start. If you have a suggestion on what you'll try, I can run a similar experiment on some of my computers. Warning, I don't really have easy access to MS products. :(