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Overview
| Comment: | Small performance optimization in the freeSpace() routine of btree.c. |
|---|---|
| Downloads: | Tarball | ZIP archive | SQL archive |
| Timelines: | family | ancestors | descendants | both | trunk |
| Files: | files | file ages | folders |
| SHA1: |
63962e2a927963575be74c3ce11f39f7 |
| User & Date: | drh 2016-09-17 19:34:32 |
Context
|
2016-09-17
| ||
| 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: baceb988 user: mistachkin tags: trunk) | |
| 19:34 | Small performance optimization in the freeSpace() routine of btree.c. (check-in: 63962e2a user: drh tags: trunk) | |
| 17:39 | Improved description of the ElseNotEq opcode in comments. No changes to code. (check-in: e011435e user: drh tags: trunk) | |
Changes
Changes to src/btree.c.
1601 1602 1603 1604 1605 1606 1607 1608 1609 1610 1611 1612 1613 1614 1615 1616 |
** 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]))>0 && iFreeBlk<iStart ){
if( iFreeBlk<iPtr+4 ) 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
|
| > > | > |
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
|