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Overview
| Comment: | Avoid unnecessary calls to sqlite3VdbeSerialType() from within sqlite3VdbeSerialPut(). |
|---|---|
| Downloads: | Tarball | ZIP archive | SQL archive |
| Timelines: | family | ancestors | descendants | both | trunk |
| Files: | files | file ages | folders |
| SHA1: |
079c04a5013074b68f7d90f1ce8bf8e7 |
| User & Date: | drh 2013-12-10 21:38:08 |
Context
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2013-12-11
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| 00:59 | Do not run the tool/vdbe-compress.tcl script that generates the vdbeExecUnion object that reduces the size of the sqlite3VdbeExec() stack frame unless the SQLITE_SMALL_STACK compile-time option is specified as on of the OPTS in the makefile. The vdbeExecUnion object gets in the way of C-compiler optimizer and results in slightly slower code. check-in: 4d078147 user: drh tags: trunk | |
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2013-12-10
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| 21:38 | Avoid unnecessary calls to sqlite3VdbeSerialType() from within sqlite3VdbeSerialPut(). check-in: 079c04a5 user: drh tags: trunk | |
| 20:53 | In the OP_MakeRecord opcode, factor out affinity changes into separate loop, for a slight performance advantage. check-in: 1c6ee9b8 user: drh tags: trunk | |
Changes
Changes to src/vdbe.c.
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i = putVarint32(zNewRecord, nHdr);
j = nHdr;
assert( pData0<=pLast );
pRec = pData0;
do{
serial_type = sqlite3VdbeSerialType(pRec, file_format);
i += putVarint32(&zNewRecord[i], serial_type); /* serial type */
j += sqlite3VdbeSerialPut(&zNewRecord[j], pRec, file_format); /* content */
}while( (++pRec)<=pLast );
assert( i==nHdr );
assert( j==nByte );
assert( pOp->p3>0 && pOp->p3<=(p->nMem-p->nCursor) );
pOut->n = (int)nByte;
pOut->flags = MEM_Blob | MEM_Dyn;
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i = putVarint32(zNewRecord, nHdr);
j = nHdr;
assert( pData0<=pLast );
pRec = pData0;
do{
serial_type = sqlite3VdbeSerialType(pRec, file_format);
i += putVarint32(&zNewRecord[i], serial_type); /* serial type */
j += sqlite3VdbeSerialPut(&zNewRecord[j], pRec, serial_type, file_format);
}while( (++pRec)<=pLast );
assert( i==nHdr );
assert( j==nByte );
assert( pOp->p3>0 && pOp->p3<=(p->nMem-p->nCursor) );
pOut->n = (int)nByte;
pOut->flags = MEM_Blob | MEM_Dyn;
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Changes to src/vdbeInt.h.
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void sqliteVdbePopStack(Vdbe*,int); int sqlite3VdbeCursorMoveto(VdbeCursor*); #if defined(SQLITE_DEBUG) || defined(VDBE_PROFILE) void sqlite3VdbePrintOp(FILE*, int, Op*); #endif u32 sqlite3VdbeSerialTypeLen(u32); u32 sqlite3VdbeSerialType(Mem*, int); u32 sqlite3VdbeSerialPut(unsigned char*, Mem*, int); u32 sqlite3VdbeSerialGet(const unsigned char*, u32, Mem*); void sqlite3VdbeDeleteAuxData(Vdbe*, int, int); int sqlite2BtreeKeyCompare(BtCursor *, const void *, int, int, int *); int sqlite3VdbeIdxKeyCompare(VdbeCursor*,UnpackedRecord*,int*); int sqlite3VdbeIdxRowid(sqlite3*, BtCursor *, i64 *); int sqlite3MemCompare(const Mem*, const Mem*, const CollSeq*); |
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void sqliteVdbePopStack(Vdbe*,int);
int sqlite3VdbeCursorMoveto(VdbeCursor*);
#if defined(SQLITE_DEBUG) || defined(VDBE_PROFILE)
void sqlite3VdbePrintOp(FILE*, int, Op*);
#endif
u32 sqlite3VdbeSerialTypeLen(u32);
u32 sqlite3VdbeSerialType(Mem*, int);
u32 sqlite3VdbeSerialPut(unsigned char*, Mem*, u32, int);
u32 sqlite3VdbeSerialGet(const unsigned char*, u32, Mem*);
void sqlite3VdbeDeleteAuxData(Vdbe*, int, int);
int sqlite2BtreeKeyCompare(BtCursor *, const void *, int, int, int *);
int sqlite3VdbeIdxKeyCompare(VdbeCursor*,UnpackedRecord*,int*);
int sqlite3VdbeIdxRowid(sqlite3*, BtCursor *, i64 *);
int sqlite3MemCompare(const Mem*, const Mem*, const CollSeq*);
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Changes to src/vdbeaux.c.
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** for allocating enough space to buf[] to hold the entire field, exclusive
** of the pMem->u.nZero bytes for a MEM_Zero value.
**
** Return the number of bytes actually written into buf[]. The number
** of bytes in the zero-filled tail is included in the return value only
** if those bytes were zeroed in buf[].
*/
u32 sqlite3VdbeSerialPut(u8 *buf, Mem *pMem, int file_format){
u32 serial_type = sqlite3VdbeSerialType(pMem, file_format);
u32 len;
/* Integer and Real */
if( serial_type<=7 && serial_type>0 ){
u64 v;
u32 i;
if( serial_type==7 ){
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| < |
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** for allocating enough space to buf[] to hold the entire field, exclusive
** of the pMem->u.nZero bytes for a MEM_Zero value.
**
** Return the number of bytes actually written into buf[]. The number
** of bytes in the zero-filled tail is included in the return value only
** if those bytes were zeroed in buf[].
*/
u32 sqlite3VdbeSerialPut(u8 *buf, Mem *pMem, u32 serial_type, int file_format){
u32 len;
/* Integer and Real */
if( serial_type<=7 && serial_type>0 ){
u64 v;
u32 i;
if( serial_type==7 ){
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Changes to src/vdbemem.c.
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nRet = 1 + nSerial + nVal;
aRet = sqlite3DbMallocRaw(db, nRet);
if( aRet==0 ){
sqlite3_result_error_nomem(context);
}else{
aRet[0] = nSerial+1;
sqlite3PutVarint(&aRet[1], iSerial);
sqlite3VdbeSerialPut(&aRet[1+nSerial], argv[0], file_format);
sqlite3_result_blob(context, aRet, nRet, SQLITE_TRANSIENT);
sqlite3DbFree(db, aRet);
}
}
/*
** Register built-in functions used to help read ANALYZE data.
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nRet = 1 + nSerial + nVal;
aRet = sqlite3DbMallocRaw(db, nRet);
if( aRet==0 ){
sqlite3_result_error_nomem(context);
}else{
aRet[0] = nSerial+1;
sqlite3PutVarint(&aRet[1], iSerial);
sqlite3VdbeSerialPut(&aRet[1+nSerial], argv[0], iSerial, file_format);
sqlite3_result_blob(context, aRet, nRet, SQLITE_TRANSIENT);
sqlite3DbFree(db, aRet);
}
}
/*
** Register built-in functions used to help read ANALYZE data.
|