wiredtiger/wiredtiger — pull request #941 by keithbostic (2014-04-02 16:29:37+00:00)
Title: shorten the parent page lock duration when splitting

@michaelcahill: I moved the child page discard and the building of the split page's replacement WT_REF structures outside of the parent page lock in the split code. I doubt there are many workloads this will help, but I wanted to make the change while I still remembered how it all worked. It's slightly more complicated this way, but it means almost no heavy-weight operations while holding the parent locked.