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Overview
| Comment: | Minor performance improvement for balance_nonroot(). |
|---|---|
| Downloads: | Tarball | ZIP archive | SQL archive |
| Timelines: | family | ancestors | descendants | both | trunk |
| Files: | files | file ages | folders |
| SHA3-256: |
d7434cae3edc321e2f1f8d340a0e656b |
| User & Date: | dan 2019-08-24 21:02:47 |
Context
|
2019-08-26
| ||
| 12:50 | Enforce 80-character line discipline in the CLI. Minor improvements to the CLI built-in help. (check-in: 9690013a00 user: drh tags: trunk) | |
|
2019-08-24
| ||
| 21:02 | Minor performance improvement for balance_nonroot(). (check-in: d7434cae3e user: dan tags: trunk) | |
| 17:11 | Fix a potential buffer overrun in fts5 caused by corrupt database records. (check-in: 156d612800 user: dan tags: trunk) | |
Changes
Changes to src/btree.c.
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assert( CORRUPT_DB || pPg->hdrOffset==0 ); /* Never called on page 1 */
if( iEnd<=iFirst ) return 0;
for(k=0; pCArray->ixNx[k]<=i && ALWAYS(k<NB*2); k++){}
pEnd = pCArray->apEnd[k];
while( 1 /*Exit by break*/ ){
int sz, rc;
u8 *pSlot;
sz = cachedCellSize(pCArray, i);
if( (aData[1]==0 && aData[2]==0) || (pSlot = pageFindSlot(pPg,sz,&rc))==0 ){
if( (pData - pBegin)<sz ) return 1;
pData -= sz;
pSlot = pData;
}
/* pSlot and pCArray->apCell[i] will never overlap on a well-formed
** database. But they might for a corrupt database. Hence use memmove()
................................................................................
int iCell = (iOld + pPg->aiOvfl[i]) - iNew;
if( iCell>=0 && iCell<nNew ){
pCellptr = &pPg->aCellIdx[iCell * 2];
if( nCell>iCell ){
memmove(&pCellptr[2], pCellptr, (nCell - iCell) * 2);
}
nCell++;
if( pageInsertArray(
pPg, pBegin, &pData, pCellptr,
iCell+iNew, 1, pCArray
) ) goto editpage_fail;
}
}
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>
>
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6988
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6992
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6994
6995
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....
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assert( CORRUPT_DB || pPg->hdrOffset==0 ); /* Never called on page 1 */
if( iEnd<=iFirst ) return 0;
for(k=0; pCArray->ixNx[k]<=i && ALWAYS(k<NB*2); k++){}
pEnd = pCArray->apEnd[k];
while( 1 /*Exit by break*/ ){
int sz, rc;
u8 *pSlot;
assert( pCArray->szCell[i]!=0 );
sz = pCArray->szCell[i];
if( (aData[1]==0 && aData[2]==0) || (pSlot = pageFindSlot(pPg,sz,&rc))==0 ){
if( (pData - pBegin)<sz ) return 1;
pData -= sz;
pSlot = pData;
}
/* pSlot and pCArray->apCell[i] will never overlap on a well-formed
** database. But they might for a corrupt database. Hence use memmove()
................................................................................
int iCell = (iOld + pPg->aiOvfl[i]) - iNew;
if( iCell>=0 && iCell<nNew ){
pCellptr = &pPg->aCellIdx[iCell * 2];
if( nCell>iCell ){
memmove(&pCellptr[2], pCellptr, (nCell - iCell) * 2);
}
nCell++;
cachedCellSize(pCArray, iCell+iNew);
if( pageInsertArray(
pPg, pBegin, &pData, pCellptr,
iCell+iNew, 1, pCArray
) ) goto editpage_fail;
}
}
|