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Small performance improvement in freeSpace().

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FossilOrigin-Name: 8dc5292ee592f16451441e33ad0800ba10a21ecd63f1f9926d6915a59a1552d3
This commit is contained in:
drh
2023-04-07 13:21:20 +00:00
parent 50dc8d9720
commit b39f037ca5
3 changed files with 14 additions and 17 deletions
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14
src/btree.c
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@@ -1919,6 +1919,11 @@ static int freeSpace(MemPage *pPage, u16 iStart, u16 iSize){
}
pTmp = &data[hdr+5];
x = get2byte(pTmp);
if( pPage->pBt->btsFlags & BTS_FAST_SECURE ){
/* Overwrite deleted information with zeros when the secure_delete
** option is enabled */
memset(&data[iStart], 0, iSize);
}
if( iStart<=x ){
/* The new freeblock is at the beginning of the cell content area,
** so just extend the cell content area rather than create another
@@ -1930,14 +1935,9 @@ static int freeSpace(MemPage *pPage, u16 iStart, u16 iSize){
}else{
/* Insert the new freeblock into the freelist */
put2byte(&data[iPtr], iStart);
put2byte(&data[iStart], iFreeBlk);
put2byte(&data[iStart+2], iSize);
}
if( pPage->pBt->btsFlags & BTS_FAST_SECURE ){
/* Overwrite deleted information with zeros when the secure_delete
** option is enabled */
memset(&data[iStart], 0, iSize);
}
put2byte(&data[iStart], iFreeBlk);
put2byte(&data[iStart+2], iSize);
pPage->nFree += iOrigSize;
return SQLITE_OK;
}