Add a high-speed version of sqlite3GetVarint32 to vdbe.c for a 3% performance
gain. (CVS 2933) FossilOrigin-Name: a64e8251a606fb2c298d7d804f3964a9155c73c5
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@ -1,5 +1,5 @@
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C Add\stests\sto\smake\ssure\s"PRAGMA\stable_info"\sworks\susing\ssqlite3_prepare16.\nTicket\s#1606.\s(CVS\s2932)
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D 2006-01-13T01:25:06
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C Add\sa\shigh-speed\sversion\sof\ssqlite3GetVarint32\sto\svdbe.c\sfor\sa\s3%\sperformance\ngain.\s(CVS\s2933)
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D 2006-01-13T01:48:59
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F Makefile.in ab3ffd8d469cef4477257169b82810030a6bb967
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F Makefile.linux-gcc aee18d8a05546dcf1888bd4547e442008a49a092
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F README 9c4e2d6706bdcc3efdd773ce752a8cdab4f90028
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@ -86,8 +86,8 @@ F src/trigger.c 694b247476d2fc0dce003af564f79e8752fc1158
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F src/update.c 261d75c702c2852d1a64274d7c414485e6f2d177
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F src/utf.c b7bffac4260177ae7f83c01d025fe0f5ed70ce71
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F src/util.c 1d751152ab36d2756deec68e576366f58b73968f
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F src/vacuum.c cd56995ecea281b3ac306ef88128ebc8a2117f84
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F src/vdbe.c 59df15f96354ddd051212499e0cf4a3392c522c1
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F src/vacuum.c 21a3c7f6f7be86bb1182fbc3df416ad702435b9e
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F src/vdbe.c f77826242cea1789990bc8ee590a30827d514475
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F src/vdbe.h 8729a4ee16ff9aeab2af9667df3cf300ff978e13
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F src/vdbeInt.h 5451cf71f229e366ac543607c0a17f36e5737ea9
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F src/vdbeapi.c afd3837cea0dec93dcb4724d073c84fa0da68e23
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@ -340,7 +340,7 @@ F www/tclsqlite.tcl bb0d1357328a42b1993d78573e587c6dcbc964b9
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F www/vdbe.tcl 87a31ace769f20d3627a64fa1fade7fed47b90d0
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F www/version3.tcl a99cf5f6d8bd4d5537584a2b342f0fb9fa601d8b
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F www/whentouse.tcl 97e2b5cd296f7d8057e11f44427dea8a4c2db513
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P 94eac140f2363c7c3df68fa6f46728abfbfee1e6
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R ba7eec4e12c4f8d86b5257326d18ba78
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P ace8ba817766f9da270cd7f06b68cc537768a8be
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R 4f16d865eb1a68e0be85977f1ba457c6
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U drh
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Z d711b0916a7e82a2a363fa2441e78363
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Z a443a150c79d39fb2ce3f4a546cc3706
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@ -1 +1 @@
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ace8ba817766f9da270cd7f06b68cc537768a8be
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a64e8251a606fb2c298d7d804f3964a9155c73c5
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@ -14,7 +14,7 @@
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** Most of the code in this file may be omitted by defining the
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** SQLITE_OMIT_VACUUM macro.
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**
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** $Id: vacuum.c,v 1.56 2006/01/11 16:10:20 danielk1977 Exp $
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** $Id: vacuum.c,v 1.57 2006/01/13 01:48:59 drh Exp $
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*/
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#include "sqliteInt.h"
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#include "vdbeInt.h"
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@ -101,7 +101,6 @@ int sqlite3RunVacuum(char **pzErrMsg, sqlite3 *db){
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Btree *pMain; /* The database being vacuumed */
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Btree *pTemp;
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char *zSql = 0;
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int rc2;
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int saved_flags; /* Saved value of the db->flags */
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Db *pDb = 0; /* Database to detach at end of vacuum */
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22
src/vdbe.c
22
src/vdbe.c
@ -43,7 +43,7 @@
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** in this file for details. If in doubt, do not deviate from existing
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** commenting and indentation practices when changing or adding code.
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**
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** $Id: vdbe.c,v 1.525 2006/01/12 17:20:51 drh Exp $
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** $Id: vdbe.c,v 1.526 2006/01/13 01:48:59 drh Exp $
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*/
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#include "sqliteInt.h"
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#include "os.h"
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@ -101,6 +101,22 @@ int sqlite3_sort_count = 0;
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*/
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#define Dynamicify(P,enc) sqlite3VdbeMemDynamicify(P)
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/*
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** The header of a record consists of a sequence variable-length integers.
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** These integers are almost always small and are encoded as a single byte.
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** The following macro takes advantage this fact to provide a fast decode
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** of the integers in a record header. It is faster for the common case
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** where the integer is a single byte. It is a little slower when the
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** integer is two or more bytes. But overall it is faster.
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**
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** The following expressions are equivalent:
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**
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** x = sqlite3GetVarint32( A, &B );
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**
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** x = GetVarint( A, B );
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**
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*/
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#define GetVarint(A,B) ((B = *(A))<=0x7f ? 1 : sqlite3GetVarint32(A, &B))
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/*
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** An ephemeral string value (signified by the MEM_Ephem flag) contains
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@ -1991,7 +2007,7 @@ case OP_Column: {
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pC->aRow = 0;
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}
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}
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idx = sqlite3GetVarint32((u8*)zData, &szHdr);
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idx = GetVarint((u8*)zData, szHdr);
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/* The KeyFetch() or DataFetch() above are fast and will get the entire
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@ -2018,7 +2034,7 @@ case OP_Column: {
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i = 0;
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while( idx<szHdr && i<nField && offset<=payloadSize ){
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aOffset[i] = offset;
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idx += sqlite3GetVarint32((u8*)&zData[idx], &aType[i]);
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idx += GetVarint((u8*)&zData[idx], aType[i]);
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offset += sqlite3VdbeSerialTypeLen(aType[i]);
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i++;
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}
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