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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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16
manifest
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@ -1,5 +1,5 @@
C The\sputVarint32()\smacro\sdoes\snot\soptimize\swell.\s\sSo\sexpand\sit\sinto\sin-line\ncode\sin\splaces\swere\sperformance\sis\san\sissue.
D 2022-04-01T21:01:37.702
C In-line\sthe\ssqlite3VdbeSerialPut()\sroutine\sinto\sthe\sOP_MakeRecord\sopcode.\nThis\sallows\ssome\sduplicate\scomparisons\sto\sbe\somitted,\sresulting\sin\sa\ssize\nreduction\sand\sperformance\sincrease.
D 2022-04-02T14:30:58.141
F .fossil-settings/empty-dirs dbb81e8fc0401ac46a1491ab34a7f2c7c0452f2f06b54ebb845d024ca8283ef1
F .fossil-settings/ignore-glob 35175cdfcf539b2318cb04a9901442804be81cd677d8b889fcc9149c21f239ea
F LICENSE.md df5091916dbb40e6e9686186587125e1b2ff51f022cc334e886c19a0e9982724
@ -624,11 +624,11 @@ F src/upsert.c 8789047a8f0a601ea42fa0256d1ba3190c13746b6ba940fe2d25643a7e991937
F src/utf.c ee39565f0843775cc2c81135751ddd93eceb91a673ea2c57f61c76f288b041a0
F src/util.c 602fe229f32a96ceccae4f40824129669582096f7c355f53dbac156c9fecef23
F src/vacuum.c 6c38ddc52f0619865c91dae9c441d4d48bf3040d7dc1bc5b22da1e45547ed0b3
F src/vdbe.c ced0c7b4b872bd30b25f40be70c0ecae095b1dafd9510912ed24369b7efef335
F src/vdbe.c 3500a7ebd2121765ce422b971bf65ab5f4d3d177b7ed2c04270423fb77f45b35
F src/vdbe.h a1d0e3b934e835e73edd146f2e7c4eadb711b5c9875c18159a57483fd78e550e
F src/vdbeInt.h 22babf1e585ae7e5c49f2e6442969b88f07bdcc3d154164346d25ef4efa3ebf3
F src/vdbeInt.h 106930790a7619bc6e851be698e6e35c6b2b2e9e66c2f464d597d6b75b919679
F src/vdbeapi.c 5c498998c99667f16cac2519f2fa439fe46acf99a332b0caa73637fc2ab35c22
F src/vdbeaux.c 7be57b47c60e348c32048d2e33c719b3d918a2aef36b30c6da571033c489dd58
F src/vdbeaux.c 7a9df2e5700351221a152775e05d0b4ce9aa73b0d04bcfabeb85ab2229052bac
F src/vdbeblob.c 5e61ce31aca17db8fb60395407457a8c1c7fb471dde405e0cd675974611dcfcd
F src/vdbemem.c 062cd58c54f887dc2eeb865686251c17237f791f0e6394e9c6f7a6f3c1a7e206
F src/vdbesort.c 43756031ca7430f7aec3ef904824a7883c4ede783e51f280d99b9b65c0796e35
@ -1945,8 +1945,8 @@ F vsixtest/vsixtest.tcl 6a9a6ab600c25a91a7acc6293828957a386a8a93
F vsixtest/vsixtest.vcxproj.data 2ed517e100c66dc455b492e1a33350c1b20fbcdc
F vsixtest/vsixtest.vcxproj.filters 37e51ffedcdb064aad6ff33b6148725226cd608e
F vsixtest/vsixtest_TemporaryKey.pfx e5b1b036facdb453873e7084e1cae9102ccc67a0
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R ade274038cb2118d099723f504530cb1
P 390c239e53cf936a97b268dce8171f0b17050542ae64735ca8ef375fec2c9544
R b3527f8e2f58b460cb9579ec710b98c3
U drh
Z 4ae04a2d928465896e499e8a40353d10
Z dbc3ad7d55ca1ccbb3a168f87a1e7a5d
# Remove this line to create a well-formed Fossil manifest.

2
manifest.uuid
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@ -1 +1 @@
390c239e53cf936a97b268dce8171f0b17050542ae64735ca8ef375fec2c9544
6f4d6f212a3558c27be6e9dcf71cec43c424d445e5889c6e91dde84a19c5a2c1

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++;
}

9
src/vdbeInt.h
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@ -532,6 +532,8 @@ struct ValueList {
sqlite3_value *pOut; /* Register to hold each decoded output value */
};
const u8 sqlite3SmallTypeSizes[128];
/*
** Function prototypes
*/
@ -544,7 +546,12 @@ int SQLITE_NOINLINE sqlite3VdbeFinishMoveto(VdbeCursor*);
int sqlite3VdbeCursorRestore(VdbeCursor*);
u32 sqlite3VdbeSerialTypeLen(u32);
u8 sqlite3VdbeOneByteSerialTypeLen(u8);
u32 sqlite3VdbeSerialPut(unsigned char*, Mem*, u32);
#ifdef SQLITE_MIXED_ENDIAN_64BIT_FLOAT
u64 sqlite3FloatSwap(u64 in);
# define swapMixedEndianFloat(X) X = sqlite3FloatSwap(X)
#else
# define swapMixedEndianFloat(X)
#endif
void sqlite3VdbeSerialGet(const unsigned char*, u32, Mem*);
void sqlite3VdbeDeleteAuxData(sqlite3*, AuxData**, int, int);

59
src/vdbeaux.c
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@ -3557,7 +3557,7 @@ int sqlite3VdbeCursorRestore(VdbeCursor *p){
** sqlite3VdbeSerialType()
** sqlite3VdbeSerialTypeLen()
** sqlite3VdbeSerialLen()
** sqlite3VdbeSerialPut()
** sqlite3VdbeSerialPut() <--- in-lined into OP_MakeRecord as of 2022-04-02
** sqlite3VdbeSerialGet()
**
** encapsulate the code that serializes values for storage in SQLite
@ -3669,7 +3669,7 @@ u32 sqlite3VdbeSerialType(Mem *pMem, int file_format, u32 *pLen){
/*
** The sizes for serial types less than 128
*/
static const u8 sqlite3SmallTypeSizes[] = {
const u8 sqlite3SmallTypeSizes[128] = {
/* 0 1 2 3 4 5 6 7 8 9 */
/* 0 */ 0, 1, 2, 3, 4, 6, 8, 8, 0, 0,
/* 10 */ 0, 0, 0, 0, 1, 1, 2, 2, 3, 3,
@ -3738,7 +3738,7 @@ u8 sqlite3VdbeOneByteSerialTypeLen(u8 serial_type){
** so we trust him.
*/
#ifdef SQLITE_MIXED_ENDIAN_64BIT_FLOAT
static u64 floatSwap(u64 in){
u64 sqlite3FloatSwap(u64 in){
union {
u64 r;
u32 i[2];
@ -3751,59 +3751,8 @@ static u64 floatSwap(u64 in){
u.i[1] = t;
return u.r;
}
# define swapMixedEndianFloat(X) X = floatSwap(X)
#else
# define swapMixedEndianFloat(X)
#endif
#endif /* SQLITE_MIXED_ENDIAN_64BIT_FLOAT */
/*
** Write the serialized data blob for the value stored in pMem into
** buf. It is assumed that the caller has allocated sufficient space.
** Return the number of bytes written.
**
** nBuf is the amount of space left in buf[]. The caller is responsible
** 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){
u32 len;
/* Integer and Real */
if( serial_type<=7 && serial_type>0 ){
u64 v;
u32 i;
if( serial_type==7 ){
assert( sizeof(v)==sizeof(pMem->u.r) );
memcpy(&v, &pMem->u.r, sizeof(v));
swapMixedEndianFloat(v);
}else{
v = pMem->u.i;
}
len = i = sqlite3SmallTypeSizes[serial_type];
assert( i>0 );
do{
buf[--i] = (u8)(v&0xFF);
v >>= 8;
}while( i );
return len;
}
/* String or blob */
if( serial_type>=12 ){
assert( pMem->n + ((pMem->flags & MEM_Zero)?pMem->u.nZero:0)
== (int)sqlite3VdbeSerialTypeLen(serial_type) );
len = pMem->n;
if( len>0 ) memcpy(buf, pMem->z, len);
return len;
}
/* NULL or constants 0 or 1 */
return 0;
}
/* Input "x" is a sequence of unsigned characters that represent a
** big-endian integer. Return the equivalent native integer