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Overview
| Comment: | Performance optimization on nodeGetCell() in R-Tree. |
|---|---|
| Downloads: | Tarball | ZIP archive | SQL archive |
| Timelines: | family | ancestors | descendants | both | rtree-enhancements |
| Files: | files | file ages | folders |
| SHA1: | 5d20ff9ec837ad35bc44d6c25d13764b |
| User & Date: | drh 2014-04-16 21:02:28 |
Context
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2014-04-17
| ||
| 13:15 | Refactor the constraint checking logic in RTree. The new-style constraint callbacks created by sqlite3_rtree_query_callback() are now hooked up from end to end, though still untested. check-in: 32a13870 user: drh tags: rtree-enhancements | |
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2014-04-16
| ||
| 21:02 | Performance optimization on nodeGetCell() in R-Tree. check-in: 5d20ff9e user: drh tags: rtree-enhancements | |
| 17:23 | Convert the RTree module query mechanism over to using a priority queue for walking the RTree. check-in: f26936f7 user: drh tags: rtree-enhancements | |
Changes
Changes to ext/rtree/rtree.c.
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*/
static void nodeGetCell(
Rtree *pRtree, /* The overall R-Tree */
RtreeNode *pNode, /* The node containing the cell to be read */
int iCell, /* Index of the cell within the node */
RtreeCell *pCell /* OUT: Write the cell contents here */
){
int ii;
pCell->iRowid = nodeGetRowid(pRtree, pNode, iCell);
for(ii=0; ii<pRtree->nDim*2; ii++){
nodeGetCoord(pRtree, pNode, iCell, ii, &pCell->aCoord[ii]);
}
}
/* Forward declaration for the function that does the work of
** the virtual table module xCreate() and xConnect() methods.
*/
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| > > > | < > > > |
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*/
static void nodeGetCell(
Rtree *pRtree, /* The overall R-Tree */
RtreeNode *pNode, /* The node containing the cell to be read */
int iCell, /* Index of the cell within the node */
RtreeCell *pCell /* OUT: Write the cell contents here */
){
u8 *pData;
u8 *pEnd;
RtreeCoord *pCoord;
pCell->iRowid = nodeGetRowid(pRtree, pNode, iCell);
pData = pNode->zData + (12 + pRtree->nBytesPerCell*iCell);
pEnd = pData + pRtree->nDim*8;
pCoord = pCell->aCoord;
for(; pData<pEnd; pData+=4, pCoord++){
readCoord(pData, pCoord);
}
}
/* Forward declaration for the function that does the work of
** the virtual table module xCreate() and xConnect() methods.
*/
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