If someone already mentioned this than sorry for the repeating it.
This is an interesting paper comparing various OS's for PC's, including
NetBSD.

  http://www.das.harvard.edu/users/faculty/Brad_Chen/ftp_docs.html

  Title:  The Measured Performance of Personal Computer Operating
  Systems -- to appear in 1995 SOSP.

Thanks,

Jim Bachesta
Tera Computer Company
bachesta@tera.com