| From: | tgl(at)postgresql(dot)org (Tom Lane) |
|---|---|
| To: | pgsql-committers(at)postgresql(dot)org |
| Subject: | pgsql: Optimize the case where a btree indexscan has current and mark |
| Date: | 2006-08-24 01:18:34 |
| Message-ID: | 20060824011834.990639FB1F0@postgresql.org |
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| Lists: | pgsql-committers |
Log Message:
-----------
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
Modified Files:
--------------
pgsql/src/backend/access/nbtree:
nbtree.c (r1.149 -> r1.150)
(http://developer.postgresql.org/cvsweb.cgi/pgsql/src/backend/access/nbtree/nbtree.c.diff?r1=1.149&r2=1.150)
nbtsearch.c (r1.105 -> r1.106)
(http://developer.postgresql.org/cvsweb.cgi/pgsql/src/backend/access/nbtree/nbtsearch.c.diff?r1=1.105&r2=1.106)
pgsql/src/include/access:
nbtree.h (r1.103 -> r1.104)
(http://developer.postgresql.org/cvsweb.cgi/pgsql/src/include/access/nbtree.h.diff?r1=1.103&r2=1.104)
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