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Small performance optimization in sqlite3VdbeRecordCompareWithSkip() for

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the common case where the comparison is equal.

FossilOrigin-Name: 1e616e256a4fb1b64271706fdfa77dc5790eba0a2f0e619544e169bc61d7c805
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drh 2018-06-06 20:29:19 +00:00
parent 4011c44322
commit d882108a01
3 changed files with 9 additions and 8 deletions
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@ -1,5 +1,5 @@
C Rearrange\sthe\sorder\sof\ssome\schecks\sin\sthe\sintegrity_check\spragma\sfor\sa\svery\nslight\sperformance\sgain.
D 2018-06-06T19:48:19.360
C Small\sperformance\soptimization\sin\ssqlite3VdbeRecordCompareWithSkip()\sfor\nthe\scommon\scase\swhere\sthe\scomparison\sis\sequal.
D 2018-06-06T20:29:19.541
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F Makefile.in bfc40f350586923e0419d2ea4b559c37ec10ee4b6e210e08c14401f8e340f0da
@ -569,7 +569,7 @@ F src/vdbe.c ffa02701cda500e0770abf139d860447e546949c5d55acab58ad8239ad92daf0
F src/vdbe.h e3f43bcc27ff30b0f25a6104d0cb5657e1c4b5e1b5cd2dd2216d5bcc2156a746
F src/vdbeInt.h 42d3e65ea0c664f6d9bc9a53de645c0baf8566ff0188409ff3b8d2abc327bc17
F src/vdbeapi.c 765a0bbe01311626417de6cb743f7f25f9f98435c98a9df4bb0714d11014633d
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F src/vdbeblob.c f5c70f973ea3a9e915d1693278a5f890dc78594300cf4d54e64f2b0917c94191
F src/vdbemem.c 803323406d8623a7619ea5d5f74016697eeaed19c02b98ce9c3013e77dbe1c38
F src/vdbesort.c 731a09e5cb9e96b70c394c1b7cf3860fbe84acca7682e178615eb941a3a0ef2f
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src/vdbeaux.c
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@ -4284,10 +4284,11 @@ int sqlite3VdbeRecordCompareWithSkip(
}
i++;
if( i==pPKey2->nField ) break;
pRhs++;
d1 += sqlite3VdbeSerialTypeLen(serial_type);
idx1 += sqlite3VarintLen(serial_type);
}while( idx1<(unsigned)szHdr1 && i<pPKey2->nField && d1<=(unsigned)nKey1 );
}while( idx1<(unsigned)szHdr1 && d1<=(unsigned)nKey1 );
/* No memory allocation is ever used on mem1. Prove this using
** the following assert(). If the assert() fails, it indicates a