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A simple change to the OP_Function opcode improves overall performance by 

about 0.5%.

FossilOrigin-Name: b890eefd57fbd189f7df611e82eb1fb4b197e1c3
This commit is contained in:
drh 2013-11-21 03:43:12 +00:00
parent f93cd949a0
commit 76694c3ae5
3 changed files with 11 additions and 12 deletions
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12
manifest
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@ -1,5 +1,5 @@
C Performance\soptimization\sto\sthe\sOP_Next\sand\sOP_Prev\sopcodes.
D 2013-11-21T03:12:25.082
C A\ssimple\schange\sto\sthe\sOP_Function\sopcode\simproves\soverall\sperformance\sby\nabout\s0.5%.
D 2013-11-21T03:43:12.554
F Makefile.arm-wince-mingw32ce-gcc d6df77f1f48d690bd73162294bbba7f59507c72f
F Makefile.in 8a07bebafbfda0eb67728f4bd15a36201662d1a1
F Makefile.linux-gcc 91d710bdc4998cb015f39edf3cb314ec4f4d7e23
@ -280,7 +280,7 @@ F src/update.c c05a0ee658f1a149e0960dfd110f3b8bd846bcb0
F src/utf.c 6fc6c88d50448c469c5c196acf21617a24f90269
F src/util.c 2fa6c821d28bbdbeec1b2a7b091a281c9ef8f918
F src/vacuum.c 3728d74919d4fb1356f9e9a13e27773db60b7179
F src/vdbe.c 1aabde68130182a3cceb70d1c59122b93244b97e
F src/vdbe.c 9d8490d65b06d2e21dd0f0e6286c07e7f3095a48
F src/vdbe.h c06f0813f853566457ce9cfb1a4a4bc39a5da644
F src/vdbeInt.h 0ac03c790b8ea4568b747550ba9bbf92a8e8feb2
F src/vdbeapi.c 93a22a9ba2abe292d5c2cf304d7eb2e894dde0ed
@ -1140,7 +1140,7 @@ F tool/vdbe-compress.tcl f12c884766bd14277f4fcedcae07078011717381
F tool/warnings-clang.sh f6aa929dc20ef1f856af04a730772f59283631d4
F tool/warnings.sh d1a6de74685f360ab718efda6265994b99bbea01
F tool/win/sqlite.vsix 030f3eeaf2cb811a3692ab9c14d021a75ce41fff
P 972881c6d394c199961f01dcbeb4a6e8b5c919a1
R d4a5420dc1635b387e6b0a099e73a8c3
P ecaac28a2e78aca148fc614fe54bf2706aed8be2
R 33f1c98c35afb745f70ac2d0738f01fc
U drh
Z 0f90f7ea40ab09ca14f9f529358ed102
Z a8c7ba243cd2d2fb4fb7b6cf27c27770

2
manifest.uuid
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@ -1 +1 @@
ecaac28a2e78aca148fc614fe54bf2706aed8be2
b890eefd57fbd189f7df611e82eb1fb4b197e1c3

9
src/vdbe.c
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@ -1487,10 +1487,6 @@ case OP_Function: {
assert( pOp->p4type==P4_FUNCDEF );
ctx.pFunc = pOp->p4.pFunc;
ctx.s.flags = MEM_Null;
ctx.s.db = db;
ctx.s.xDel = 0;
ctx.s.zMalloc = 0;
ctx.iOp = pc;
ctx.pVdbe = p;
@ -1498,7 +1494,10 @@ case OP_Function: {
** the pointer to ctx.s so in case the user-function can use
** the already allocated buffer instead of allocating a new one.
*/
sqlite3VdbeMemMove(&ctx.s, pOut);
memcpy(&ctx.s, pOut, sizeof(Mem));
pOut->flags = MEM_Null;
pOut->xDel = 0;
pOut->zMalloc = 0;
MemSetTypeFlag(&ctx.s, MEM_Null);
ctx.fErrorOrAux = 0;