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Overview
| Comment: | Small performance and size optimization in sqlite3WalFindFrame(). |
|---|---|
| Downloads: | Tarball | ZIP archive | SQL archive |
| Timelines: | family | ancestors | descendants | both | trunk |
| Files: | files | file ages | folders |
| SHA3-256: |
03f2e78899fad99b0a0951b3a4082682 |
| User & Date: | drh 2019-04-17 21:12:05 |
Context
|
2019-04-19
| ||
| 13:38 | Streamline the processing of the AND operator. Slightly smaller and faster. check-in: 7713996a user: drh tags: trunk | |
|
2019-04-18
| ||
| 19:21 | Minor simplification of NULL value handling for STAT4. Closed-Leaf check-in: 5718a9d5 user: mistachkin tags: nullStat4 | |
|
2019-04-17
| ||
| 23:32 | Work around lack of a C99 feature in MSVC. check-in: f6ebe1c2 user: mistachkin tags: msvc | |
| 21:12 | Small performance and size optimization in sqlite3WalFindFrame(). check-in: 03f2e788 user: drh tags: trunk | |
| 13:58 | Fix a typo in the CLI help output for the ".dump" command. check-in: 57638248 user: drh tags: trunk | |
Changes
Changes to src/wal.c.
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rc = walHashGet(pWal, iHash, &sLoc);
if( rc!=SQLITE_OK ){
return rc;
}
nCollide = HASHTABLE_NSLOT;
for(iKey=walHash(pgno); sLoc.aHash[iKey]; iKey=walNextHash(iKey)){
u32 iFrame = sLoc.aHash[iKey] + sLoc.iZero;
if( iFrame<=iLast && iFrame>=pWal->minFrame
&& sLoc.aPgno[sLoc.aHash[iKey]]==pgno ){
assert( iFrame>iRead || CORRUPT_DB );
iRead = iFrame;
}
if( (nCollide--)==0 ){
return SQLITE_CORRUPT_BKPT;
}
}
|
| | | |
2904 2905 2906 2907 2908 2909 2910 2911 2912 2913 2914 2915 2916 2917 2918 2919 2920 |
rc = walHashGet(pWal, iHash, &sLoc);
if( rc!=SQLITE_OK ){
return rc;
}
nCollide = HASHTABLE_NSLOT;
for(iKey=walHash(pgno); sLoc.aHash[iKey]; iKey=walNextHash(iKey)){
u32 iH = sLoc.aHash[iKey];
u32 iFrame = iH + sLoc.iZero;
if( iFrame<=iLast && iFrame>=pWal->minFrame && sLoc.aPgno[iH]==pgno ){
assert( iFrame>iRead || CORRUPT_DB );
iRead = iFrame;
}
if( (nCollide--)==0 ){
return SQLITE_CORRUPT_BKPT;
}
}
|