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Overview
| Comment: | More RTREE performance optimizations related to decoding values. |
|---|---|
| Downloads: | Tarball | ZIP archive |
| Timelines: | family | ancestors | descendants | both | trunk |
| Files: | files | file ages | folders |
| SHA1: |
c5395e7496d0cd593f5e16ee5f6719d0 |
| User & Date: | drh 2017-02-01 02:25:28.535 |
Context
|
2017-02-01
| ||
| 14:10 | Changes so that the pre-update hook and the sessions module work with WITHOUT ROWID tables. (check-in: 964bdc27f8 user: dan tags: trunk) | |
| 02:25 | More RTREE performance optimizations related to decoding values. (check-in: c5395e7496 user: drh tags: trunk) | |
| 01:34 | Improved comments on the statGet() implementation in ANALYZE. No changes to code. (check-in: 9663eea2a1 user: drh tags: trunk) | |
Changes
Changes to ext/rtree/rtree.c.
| ︙ | ︙ | |||
366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 |
** Functions to deserialize a 16 bit integer, 32 bit real number and
** 64 bit integer. The deserialized value is returned.
*/
static int readInt16(u8 *p){
return (p[0]<<8) + p[1];
}
static void readCoord(u8 *p, RtreeCoord *pCoord){
pCoord->u = (
(((u32)p[0]) << 24) +
(((u32)p[1]) << 16) +
(((u32)p[2]) << 8) +
(((u32)p[3]) << 0)
);
}
static i64 readInt64(u8 *p){
return (
(((i64)p[0]) << 56) +
(((i64)p[1]) << 48) +
(((i64)p[2]) << 40) +
(((i64)p[3]) << 32) +
| > > > > > > > > | 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 |
** Functions to deserialize a 16 bit integer, 32 bit real number and
** 64 bit integer. The deserialized value is returned.
*/
static int readInt16(u8 *p){
return (p[0]<<8) + p[1];
}
static void readCoord(u8 *p, RtreeCoord *pCoord){
#if defined(SQLITE_BYTEORDER) && SQLITE_BYTEORDER==1234
memcpy(&pCoord->u, p, 4);
pCoord->u = ((pCoord->u>>24)&0xff)|((pCoord->u>>8)&0xff00)|
((pCoord->u&0xff)<<24)|((pCoord->u&0xff00)<<8);
#elif defined(SQLITE_BYTEORDER) && SQLITE_BYTEORDER==4321
memcpy(&pCoord->u, p, 4);
#else
pCoord->u = (
(((u32)p[0]) << 24) +
(((u32)p[1]) << 16) +
(((u32)p[2]) << 8) +
(((u32)p[3]) << 0)
);
#endif
}
static i64 readInt64(u8 *p){
return (
(((i64)p[0]) << 56) +
(((i64)p[1]) << 48) +
(((i64)p[2]) << 40) +
(((i64)p[3]) << 32) +
|
| ︙ | ︙ | |||
732 733 734 735 736 737 738 |
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;
RtreeCoord *pCoord;
| | > > > > > > > > | 740 741 742 743 744 745 746 747 748 749 750 751 752 753 754 755 756 757 758 759 760 761 762 763 764 765 766 767 768 |
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;
RtreeCoord *pCoord;
int ii = 0;
pCell->iRowid = nodeGetRowid(pRtree, pNode, iCell);
pData = pNode->zData + (12 + pRtree->nBytesPerCell*iCell);
pCoord = pCell->aCoord;
do{
readCoord(pData, &pCoord[ii]);
readCoord(pData+4, &pCoord[ii+1]);
pData += 8;
ii += 2;
}while( ii<pRtree->nDim*2 );
#if 0
for(ii=0; ii<pRtree->nDim*2; ii++){
readCoord(&pData[ii*4], &pCoord[ii]);
}
#endif
}
/* Forward declaration for the function that does the work of
** the virtual table module xCreate() and xConnect() methods.
*/
static int rtreeInit(
|
| ︙ | ︙ |