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Small performance improvement on sqlite3BtreeMoveto. (CVS 2934)

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FossilOrigin-Name: c780152f3cff9c0a13d231935ae3c2e2d28b4460
This commit is contained in:
drh
2006-01-13 02:35:09 +00:00
parent d508e7f1a1
commit 366fda6e60
3 changed files with 11 additions and 13 deletions
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10
src/btree.c
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@@ -9,7 +9,7 @@
** May you share freely, never taking more than you give.
**
*************************************************************************
** $Id: btree.c,v 1.293 2006/01/12 15:01:16 drh Exp $
** $Id: btree.c,v 1.294 2006/01/13 02:35:10 drh Exp $
**
** This file implements a external (disk-based) database using BTrees.
** For a detailed discussion of BTrees, refer to
@@ -2901,8 +2901,7 @@ static int getPayload(
pageIntegrity(pPage);
assert( pCur->idx>=0 && pCur->idx<pPage->nCell );
getCellInfo(pCur);
aPayload = pCur->info.pCell;
aPayload += pCur->info.nHeader;
aPayload = pCur->info.pCell + pCur->info.nHeader;
if( pPage->intKey ){
nKey = 0;
}else{
@@ -3326,6 +3325,7 @@ int sqlite3BtreeMoveto(BtCursor *pCur, const void *pKey, i64 nKey, int *pRes){
void *pCellKey;
i64 nCellKey;
pCur->idx = (lwr+upr)/2;
pCur->info.nSize = 0;
if( pPage->intKey ){
u8 *pCell = findCell(pPage, pCur->idx);
pCell += pPage->childPtrSize;
@@ -3334,7 +3334,6 @@ int sqlite3BtreeMoveto(BtCursor *pCur, const void *pKey, i64 nKey, int *pRes){
pCell += getVarint32(pCell, &dummy);
}
getVarint(pCell, &nCellKey);
pCur->info.nSize = 0;
if( nCellKey<nKey ){
c = -1;
}else if( nCellKey>nKey ){
@@ -3344,9 +3343,8 @@ int sqlite3BtreeMoveto(BtCursor *pCur, const void *pKey, i64 nKey, int *pRes){
}
}else{
int available;
parseCell(pPage, pCur->idx, &pCur->info);
nCellKey = pCur->info.nKey;
pCellKey = (void *)fetchPayload(pCur, &available, 0);
nCellKey = pCur->info.nKey;
if( available>=nCellKey ){
c = pCur->xCompare(pCur->pArg, nCellKey, pCellKey, nKey, pKey);
}else{