wiredtiger/wiredtiger — pull request #705 by michaelcahill (2013-10-04 16:18:18+00:00)
Title: Always cache the last key returned for use in scans.

Otherwise, we can do huge amounts of unnecessary work in __cursor_row_slot_return when scanning some pages. This change speeds up test_backup03 by over 20% (by speeding up "wt dump").