Here is a thread with more tips on logging durametric that I wish I had read again before I did mine.
Durametric Logging 101: How to Log, What to Log, and What to do with it Afterwards - 6speedonline.com Forums
Disabling the virus scanner and disabling the graph are two of the ways they say that help log more data points per second. I would add, set your laptop on a high-performance power plan before starting.