wiredtiger/wiredtiger — pull request #470 by keithbostic (2013-03-01 00:41:10+00:00)
Title: Rework hazard pointer coupling during cursor walks to be more efficient.

Michael, here is the change I mentioned, it passes the test suite and runs test/format.

It appears to reduce the number of hazard references required for cursor traversal by about 50% (which should have a positive impact on checkpoints, not just cursor operations).