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Change BtreeMoveto so that it can be biased to the right or to the center.

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Use a right bias when appending and a center bias when searching.  This
gives about a 15% reduction in calls to sqlite3VdbeRecordCompare. (CVS 3741)

FossilOrigin-Name: ad4a6b1a91bcefd8a4c75e8dc99c1153c72c31a3
This commit is contained in:
drh
2007-03-29 05:51:49 +00:00
parent f1d68b3096
commit e4d9081307
13 changed files with 101 additions and 67 deletions
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4
src/update.c
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@@ -12,7 +12,7 @@
** This file contains C code routines that are called by the parser
** to handle UPDATE statements.
**
** $Id: update.c,v 1.136 2007/02/21 17:04:04 danielk1977 Exp $
** $Id: update.c,v 1.137 2007/03/29 05:51:49 drh Exp $
*/
#include "sqliteInt.h"
@@ -465,7 +465,7 @@ void sqlite3Update(
/* Create the new index entries and the new record.
*/
sqlite3CompleteInsertion(pParse, pTab, iCur, aIdxUsed, chngRowid, 1, -1);
sqlite3CompleteInsertion(pParse, pTab, iCur, aIdxUsed, chngRowid, 1, -1, 0);
}
/* Increment the row counter