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Small performance improvement to the key-comparision routine for strings.

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FossilOrigin-Name: 41454499a2b63c5fe6fae2d2085773a5f7d869250dcbe669929d20c961211f70
This commit is contained in:
drh 2020-01-28 20:09:39 +00:00
parent fbfd113365
commit 925ab5c17e
3 changed files with 11 additions and 8 deletions
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12
manifest
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@ -1,5 +1,5 @@
C Reinstate\sthe\soptimization\sof\sconverting\s"a\sIN\s(C)"\sinto\s"a=C"\sbut\sonly\nif\sC\sis\sa\sconstant.\s\sIf\sthe\sRHS\sis\sa\stable\scolumn,\sthe\scomplications\sof\nmanaging\saffinity\sand\scollations\sbecome\stoo\sinvolved\sto\smess\swith.
D 2020-01-28T18:09:53.557
C Small\sperformance\simprovement\sto\sthe\skey-comparision\sroutine\sfor\sstrings.
D 2020-01-28T20:09:39.679
F .fossil-settings/empty-dirs dbb81e8fc0401ac46a1491ab34a7f2c7c0452f2f06b54ebb845d024ca8283ef1
F .fossil-settings/ignore-glob 35175cdfcf539b2318cb04a9901442804be81cd677d8b889fcc9149c21f239ea
F LICENSE.md df5091916dbb40e6e9686186587125e1b2ff51f022cc334e886c19a0e9982724
@ -607,7 +607,7 @@ F src/vdbe.c e3dd230ece613409507523e68436764cc20638bb77ba2f416097de5b37235ce1
F src/vdbe.h defd693289c7bb8d325f109be9490c77138061211a116827da7244b6015a4934
F src/vdbeInt.h 30d3e8b991547cdf39025e416a0a737b0416d46747af70ae058f60e2e0466fe7
F src/vdbeapi.c 1252d80c548711e47a6d84dae88ed4e95d3fbb4e7bd0eaa1347299af7efddf02
F src/vdbeaux.c ff690e6c9314ef281de7c06f8c8c33393f0afca80aabb1fe69836dcf2d60b0bf
F src/vdbeaux.c 6a4d2142ac75d155acb6ed42f8f3c4f562ed7a0a0c000eb459a1607d9f5ef999
F src/vdbeblob.c 253ed82894924c362a7fa3079551d3554cd1cdace39aa833da77d3bc67e7c1b1
F src/vdbemem.c 6200af702c87105d5b00d8ac5f5fa2c6d8f796aa974dbe2d15dcd95379ba1fa7
F src/vdbesort.c a3be032cc3fee0e3af31773af4a7a6f931b7230a34f53282ccf1d9a2a72343be
@ -1857,7 +1857,7 @@ F vsixtest/vsixtest.tcl 6a9a6ab600c25a91a7acc6293828957a386a8a93
F vsixtest/vsixtest.vcxproj.data 2ed517e100c66dc455b492e1a33350c1b20fbcdc
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F vsixtest/vsixtest_TemporaryKey.pfx e5b1b036facdb453873e7084e1cae9102ccc67a0
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R 52f964e8503b1d494cbf742908de4430
U drh
Z 321bb0b388d63502da00c0fc216615f8
Z a9eecf8df9e8988accc8cc90d98d595e

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manifest.uuid
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@ -1 +1 @@
8ac26a23d7f0ef29c5eb007c7467181f8b96102c8600ea8a5b15cc7584af27bd
41454499a2b63c5fe6fae2d2085773a5f7d869250dcbe669929d20c961211f70

5
src/vdbeaux.c
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@ -4726,7 +4726,10 @@ static int vdbeRecordCompareString(
assert( pPKey2->aMem[0].flags & MEM_Str );
vdbeAssertFieldCountWithinLimits(nKey1, pKey1, pPKey2->pKeyInfo);
getVarint32(&aKey1[1], serial_type);
serial_type = (u8)(aKey1[1]);
if( serial_type >= 0x80 ){
sqlite3GetVarint32(&aKey1[1], (u32*)&serial_type);
}
if( serial_type<12 ){
res = pPKey2->r1; /* (pKey1/nKey1) is a number or a null */
}else if( !(serial_type & 0x01) ){