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Overview
| Comment: | Minor performance improvement in vdbeRecordCompareString(). |
|---|---|
| Downloads: | Tarball | ZIP archive | SQL archive |
| Timelines: | family | ancestors | descendants | both | filter-clause |
| Files: | files | file ages | folders |
| SHA3-256: |
777fec84a5db968e033883920586ec0a |
| User & Date: | dan 2019-07-12 15:15:43 |
Context
|
2019-07-13
| ||
| 09:55 | Trivial performance improvement for balance(). check-in: c7920f55 user: dan tags: filter-clause | |
|
2019-07-12
| ||
| 15:15 | Minor performance improvement in vdbeRecordCompareString(). check-in: 777fec84 user: dan tags: filter-clause | |
|
2019-07-11
| ||
| 18:43 | Change the parser on this branch to more closely match trunk. This saves a few more cycles. check-in: be01b801 user: dan tags: filter-clause | |
Changes
Changes to src/vdbeaux.c.
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if( (szHdr + nStr) > nKey1 ){
pPKey2->errCode = (u8)SQLITE_CORRUPT_BKPT;
return 0; /* Corruption */
}
nCmp = MIN( pPKey2->aMem[0].n, nStr );
res = memcmp(&aKey1[szHdr], pPKey2->aMem[0].z, nCmp);
if( res==0 ){
res = nStr - pPKey2->aMem[0].n;
if( res==0 ){
if( pPKey2->nField>1 ){
res = sqlite3VdbeRecordCompareWithSkip(nKey1, pKey1, pPKey2, 1);
}else{
res = pPKey2->default_rc;
pPKey2->eqSeen = 1;
}
}else if( res>0 ){
res = pPKey2->r2;
}else{
res = pPKey2->r1;
}
}else if( res>0 ){
res = pPKey2->r2;
}else{
res = pPKey2->r1;
}
}
assert( vdbeRecordCompareDebug(nKey1, pKey1, pPKey2, res)
|| CORRUPT_DB
|| pPKey2->pKeyInfo->db->mallocFailed
);
|
| > > > > < < < < |
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if( (szHdr + nStr) > nKey1 ){
pPKey2->errCode = (u8)SQLITE_CORRUPT_BKPT;
return 0; /* Corruption */
}
nCmp = MIN( pPKey2->aMem[0].n, nStr );
res = memcmp(&aKey1[szHdr], pPKey2->aMem[0].z, nCmp);
if( res>0 ){
res = pPKey2->r2;
}else if( res<0 ){
res = pPKey2->r1;
}else{
res = nStr - pPKey2->aMem[0].n;
if( res==0 ){
if( pPKey2->nField>1 ){
res = sqlite3VdbeRecordCompareWithSkip(nKey1, pKey1, pPKey2, 1);
}else{
res = pPKey2->default_rc;
pPKey2->eqSeen = 1;
}
}else if( res>0 ){
res = pPKey2->r2;
}else{
res = pPKey2->r1;
}
}
}
assert( vdbeRecordCompareDebug(nKey1, pKey1, pPKey2, res)
|| CORRUPT_DB
|| pPKey2->pKeyInfo->db->mallocFailed
);
|