database/sqlite
1
0
Fork 0
mirror of https://github.com/sqlite/sqlite.git synced 2025-11-14 00:22:38 +03:00
Code Activity

Fix a minor performance regression in btreeMoveto().

Browse Source 
FossilOrigin-Name: d0712dfb24867a807c9cddcc12bd0aebe1d3e085
This commit is contained in:
dan
2011-09-05 20:16:38 +00:00
parent 03e9cfc223
commit 42acb3e597
5 changed files with 26 additions and 31 deletions
Download Patch File Download Diff File Expand all files Collapse all files

18
src/vdbeaux.c
View File

@@ -2859,18 +2859,19 @@ UnpackedRecord *sqlite3VdbeAllocUnpackedRecord(
** it by. If pSpace is already 8-byte aligned, nOff should be zero.
*/
nOff = (8 - (SQLITE_PTR_TO_INT(pSpace) & 7)) & 7;
pSpace += nOff;
szSpace -= nOff;
nByte = ROUND8(sizeof(UnpackedRecord)) + sizeof(Mem)*(pKeyInfo->nField+1);
if( nByte>szSpace ){
if( nByte>szSpace+nOff ){
p = (UnpackedRecord *)sqlite3DbMallocRaw(pKeyInfo->db, nByte);
*ppFree = (char *)p;
if( !p ) return 0;
}else{
p = (UnpackedRecord*)pSpace;
p = (UnpackedRecord*)&pSpace[nOff];
*ppFree = 0;
}
p->aMem = (Mem*)&((char*)p)[ROUND8(sizeof(UnpackedRecord))];
p->pKeyInfo = pKeyInfo;
p->nField = pKeyInfo->nField + 1;
return p;
}
@@ -2890,12 +2891,9 @@ void sqlite3VdbeRecordUnpack(
u32 idx; /* Offset in aKey[] to read from */
u16 u; /* Unsigned loop counter */
u32 szHdr;
Mem *pMem;
Mem *pMem = p->aMem;
p->flags = 0;
p->pKeyInfo = pKeyInfo;
p->nField = pKeyInfo->nField + 1;
p->aMem = pMem = (Mem*)&((char*)p)[ROUND8(sizeof(UnpackedRecord))];
assert( EIGHT_BYTE_ALIGNMENT(pMem) );
idx = getVarint32(aKey, szHdr);
d = szHdr;