  NTsort is an external sort on WindowsNT 5.0. It has minimal functionality but
excellent price performance. In particular, running on mail-order hardware it
can sort 1.5 GB for a penny. For commercially available sorts, Postman Sort
from Robert Ramey Software Development has elapsed time performance comparable
to NTsort, while using less processor time. It can sort 1.27 GB for a penny
(12.7 million records.) These sorts set new price-performance records. This
paper documents this and proposes that the PennySort benchmark be revised to
Performance/Price sort: a simple GB/$ sort metric based on a two-pass external
sort.
