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In-line the sqlite3VdbeSerialPut() routine into the OP_MakeRecord opcode.

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This allows some duplicate comparisons to be omitted, resulting in a size
reduction and performance increase.

FossilOrigin-Name: 6f4d6f212a3558c27be6e9dcf71cec43c424d445e5889c6e91dde84a19c5a2c1
This commit is contained in:
drh
2022-04-02 14:30:58 +00:00
parent b47b1f67dc
commit d859dc2b25
5 changed files with 53 additions and 70 deletions
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37
src/vdbe.c
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@@ -3384,15 +3384,42 @@ case OP_MakeRecord: {
while( 1 /*exit-by-break*/ ){
serial_type = pRec->uTemp;
/* EVIDENCE-OF: R-06529-47362 Following the size varint are one or more
** additional varints, one per column. */
if( serial_type<0x80 ){
** additional varints, one per column.
** EVIDENCE-OF: R-64536-51728 The values for each column in the record
** immediately follow the header. */
if( serial_type<=7 ){
*(zHdr++) = serial_type;
if( serial_type==0 ){
/* NULL value. No change in zPayload */
}else{
u64 v;
u32 i, len;
if( serial_type==7 ){
assert( sizeof(v)==sizeof(pRec->u.r) );
memcpy(&v, &pRec->u.r, sizeof(v));
swapMixedEndianFloat(v);
}else{
v = pRec->u.i;
}
len = i = sqlite3SmallTypeSizes[serial_type];
assert( i>0 );
do{
zPayload[--i] = (u8)(v&0xFF);
v >>= 8;
}while( i );
zPayload += len;
}
}else if( serial_type<0x80 ){
*(zHdr++) = serial_type;
if( serial_type>=14 ){
memcpy(zPayload, pRec->z, pRec->n);
zPayload += pRec->n;
}
}else{
zHdr += sqlite3PutVarint(zHdr, serial_type);
memcpy(zPayload, pRec->z, pRec->n);
zPayload += pRec->n;
}
/* EVIDENCE-OF: R-64536-51728 The values for each column in the record
** immediately follow the header. */
zPayload += sqlite3VdbeSerialPut(zPayload, pRec, serial_type); /* content */
if( pRec==pLast ) break;
pRec++;
}