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Overview
Comment: | Small performance optimization in the freeSpace() routine of btree.c. |
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Downloads: | Tarball | ZIP archive |
Timelines: | family | ancestors | descendants | both | trunk |
Files: | files | file ages | folders |
SHA1: |
63962e2a927963575be74c3ce11f39f7 |
User & Date: | drh 2016-09-17 19:34:32.434 |
Context
2016-09-17
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22:46 | Minor enhancement to the TclKit batch tool: it should download the TclKit EXE alone when the TCLKIT_NOENV environment variable is set. (check-in: baceb988c6 user: mistachkin tags: trunk) | |
19:34 | Small performance optimization in the freeSpace() routine of btree.c. (check-in: 63962e2a92 user: drh tags: trunk) | |
17:39 | Improved description of the ElseNotEq opcode in comments. No changes to code. (check-in: e011435e2f user: drh tags: trunk) | |
Changes
Changes to src/btree.c.
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1601 1602 1603 1604 1605 1606 1607 | ** spot on the list where iStart should be inserted. */ hdr = pPage->hdrOffset; iPtr = hdr + 1; if( data[iPtr+1]==0 && data[iPtr]==0 ){ iFreeBlk = 0; /* Shortcut for the case when the freelist is empty */ }else{ | | | > > > | 1601 1602 1603 1604 1605 1606 1607 1608 1609 1610 1611 1612 1613 1614 1615 1616 1617 1618 1619 | ** spot on the list where iStart should be inserted. */ hdr = pPage->hdrOffset; iPtr = hdr + 1; if( data[iPtr+1]==0 && data[iPtr]==0 ){ iFreeBlk = 0; /* Shortcut for the case when the freelist is empty */ }else{ while( (iFreeBlk = get2byte(&data[iPtr]))<iStart ){ if( iFreeBlk<iPtr+4 ){ if( iFreeBlk==0 ) break; return SQLITE_CORRUPT_BKPT; } iPtr = iFreeBlk; } if( iFreeBlk>iLast ) return SQLITE_CORRUPT_BKPT; assert( iFreeBlk>iPtr || iFreeBlk==0 ); /* At this point: ** iFreeBlk: First freeblock after iStart, or zero if none |
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