Rick you are right about Test5 (see below for Test6 comments) the (open-write-close) does contribute to all of the additional overhead there, and it really isn't a valid comparison to all of the other tests.  It was added because it was part of the learning process with writing to multiple files for multiple collects and then trying to wrap that in an over all waitfor.

Test6 though does open once, write 100,000 times then close and still the duration was 67 sec, so I think this is a valid comparison.

Let me know if you disagree, I'm always up for learning more.

Thanks for the comment.