Cascade merge sort

Cascade merge sort is similar to the polyphase merge sort but uses a simpler distribution. The merge is slower than a polyphase merge when there are fewer than six files, but faster when there are more than six.

• Bradley, James (1982), File and Data Base Techniques, Holt, Rinehart and Winston, ISBN 0-03-058673-9

• http://www.minkhollow.ca/Courses/461/Notes/Cosequential/Cascade.html