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Overview
| Comment: | A simple change to the OP_Function opcode improves overall performance by about 0.5%. |
|---|---|
| Downloads: | Tarball | ZIP archive | SQL archive |
| Timelines: | family | ancestors | descendants | both | trunk |
| Files: | files | file ages | folders |
| SHA1: | b890eefd57fbd189f7df611e82eb1fb4 |
| User & Date: | drh 2013-11-21 03:43:12 |
Context
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2013-11-21
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| 04:18 | Another improvement to OP_Function and an improvement to OP_Move. check-in: 70b056fb user: drh tags: trunk | |
| 03:43 | A simple change to the OP_Function opcode improves overall performance by about 0.5%. check-in: b890eefd user: drh tags: trunk | |
| 03:12 | Performance optimization to the OP_Next and OP_Prev opcodes. check-in: ecaac28a user: drh tags: trunk | |
Changes
Changes to src/vdbe.c.
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Deephemeralize(pArg);
sqlite3VdbeMemStoreType(pArg);
REGISTER_TRACE(pOp->p2+i, pArg);
}
assert( pOp->p4type==P4_FUNCDEF );
ctx.pFunc = pOp->p4.pFunc;
ctx.s.flags = MEM_Null;
ctx.s.db = db;
ctx.s.xDel = 0;
ctx.s.zMalloc = 0;
ctx.iOp = pc;
ctx.pVdbe = p;
/* The output cell may already have a buffer allocated. Move
** the pointer to ctx.s so in case the user-function can use
** the already allocated buffer instead of allocating a new one.
*/
sqlite3VdbeMemMove(&ctx.s, pOut);
MemSetTypeFlag(&ctx.s, MEM_Null);
ctx.fErrorOrAux = 0;
if( ctx.pFunc->funcFlags & SQLITE_FUNC_NEEDCOLL ){
assert( pOp>aOp );
assert( pOp[-1].p4type==P4_COLLSEQ );
assert( pOp[-1].opcode==OP_CollSeq );
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Deephemeralize(pArg);
sqlite3VdbeMemStoreType(pArg);
REGISTER_TRACE(pOp->p2+i, pArg);
}
assert( pOp->p4type==P4_FUNCDEF );
ctx.pFunc = pOp->p4.pFunc;
ctx.iOp = pc;
ctx.pVdbe = p;
/* The output cell may already have a buffer allocated. Move
** the pointer to ctx.s so in case the user-function can use
** the already allocated buffer instead of allocating a new one.
*/
memcpy(&ctx.s, pOut, sizeof(Mem));
pOut->flags = MEM_Null;
pOut->xDel = 0;
pOut->zMalloc = 0;
MemSetTypeFlag(&ctx.s, MEM_Null);
ctx.fErrorOrAux = 0;
if( ctx.pFunc->funcFlags & SQLITE_FUNC_NEEDCOLL ){
assert( pOp>aOp );
assert( pOp[-1].p4type==P4_COLLSEQ );
assert( pOp[-1].opcode==OP_CollSeq );
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