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Additional performance improvements in sqlite3BtreeMoveto. (CVS 2926)

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FossilOrigin-Name: 52b3be96b6e96994ec6fbcc67bf355cd05f61730
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drh
2006-01-12 15:01:15 +00:00
parent b562f0ba96
commit d172f86fe2
3 changed files with 18 additions and 10 deletions
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12
manifest
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@@ -1,5 +1,5 @@
C BtreeMoveto\soptimization\sgoes\sabout\s1.5%\sfaster.\s(CVS\s2925)
D 2006-01-12T14:30:19
C Additional\sperformance\simprovements\sin\ssqlite3BtreeMoveto.\s(CVS\s2926)
D 2006-01-12T15:01:16
F Makefile.in ab3ffd8d469cef4477257169b82810030a6bb967
F Makefile.linux-gcc aee18d8a05546dcf1888bd4547e442008a49a092
F README 9c4e2d6706bdcc3efdd773ce752a8cdab4f90028
@@ -34,7 +34,7 @@ F src/alter.c 4139c8f1d0f12b1759e767b1d09dd594e2b5ac1d
F src/analyze.c 7d2b7ab9a9c2fd6e55700f69064dfdd3e36d7a8a
F src/attach.c d4b9d8bd71d72409720946355be41cafb6c09079
F src/auth.c cdec356a5cd8b217c346f816c5912221537fe87f
F src/btree.c 9ac50babae65052bb7e412a5281f80d4e225b574
F src/btree.c fdbb411805bf0c0087784a4daf95b4de1b469978
F src/btree.h 5663c4f43e8521546ccebc8fc95acb013b8f3184
F src/build.c a055974683ddc465bdc8669d43d6ab35d3dbb55f
F src/callback.c ba3e6cc7a6beb562e7a66f92e26fabcb21aab1e2
@@ -340,7 +340,7 @@ F www/tclsqlite.tcl bb0d1357328a42b1993d78573e587c6dcbc964b9
F www/vdbe.tcl 87a31ace769f20d3627a64fa1fade7fed47b90d0
F www/version3.tcl a99cf5f6d8bd4d5537584a2b342f0fb9fa601d8b
F www/whentouse.tcl 97e2b5cd296f7d8057e11f44427dea8a4c2db513
P 0caa1994770142d6ca15284a26bad3879b07b15a
R 6e451212b773e5c55266fd23d96e352b
P 4e4a650484a39cac43386d8488ff42a8a0cc2820
R 63e4ec5fcdbe24706473fb0fb3b733b3
U drh
Z bd6e25ca98e62bf29a6a6907bd5ed271
Z 40fe45935ac29375621feef17be8ca40

2
manifest.uuid
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@@ -1 +1 @@
4e4a650484a39cac43386d8488ff42a8a0cc2820
52b3be96b6e96994ec6fbcc67bf355cd05f61730

14
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 1.292 2006/01/12 14:30:19 drh Exp $
** $Id: btree.c,v 1.293 2006/01/12 15:01:16 drh Exp $
**
** This file implements a external (disk-based) database using BTrees.
** For a detailed discussion of BTrees, refer to
@@ -3326,9 +3326,15 @@ int sqlite3BtreeMoveto(BtCursor *pCur, const void *pKey, i64 nKey, int *pRes){
void *pCellKey;
i64 nCellKey;
pCur->idx = (lwr+upr)/2;
parseCell(pPage, pCur->idx, &pCur->info);
nCellKey = pCur->info.nKey;
if( pPage->intKey ){
u8 *pCell = findCell(pPage, pCur->idx);
pCell += pPage->childPtrSize;
if( pPage->hasData ){
int dummy;
pCell += getVarint32(pCell, &dummy);
}
getVarint(pCell, &nCellKey);
pCur->info.nSize = 0;
if( nCellKey<nKey ){
c = -1;
}else if( nCellKey>nKey ){
@@ -3338,6 +3344,8 @@ 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);
if( available>=nCellKey ){
c = pCur->xCompare(pCur->pArg, nCellKey, pCellKey, nKey, pKey);