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(parent: 7ad642d) | patch

author	Tom Lane <tgl@sss.pgh.pa.us>
	Thu, 24 Aug 2006 01:18:34 +0000 (01:18 +0000)
committer	Tom Lane <tgl@sss.pgh.pa.us>
	Thu, 24 Aug 2006 01:18:34 +0000 (01:18 +0000)
commit	08ae5edc5c883352018ef754562fc8edbd4177fd
tree	ef87fc45a4e1dc895b98c64fdb1d1d55295af24f	tree
parent	7ad642d0b51fdb3a2fb4372f4b298d3f363b05ec	commit \| diff

Optimize the case where a btree indexscan has current and mark positions
on the same index page; we can avoid data copying as well as buffer refcount
manipulations in this common case. Makes for a small but noticeable
improvement in mergejoin speed.

Heikki Linnakangas

src/backend/access/nbtree/nbtree.c		diff \| blob \| blame \| history
src/backend/access/nbtree/nbtsearch.c		diff \| blob \| blame \| history
src/include/access/nbtree.h		diff \| blob \| blame \| history

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