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Performance enhancement in the sqlite3VdbeSerialType() routine.

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FossilOrigin-Name: ad298f52efd0ff123a1a4d6a0fa16fbd4c6b6dad
This commit is contained in:
drh 2012-09-17 15:36:31 +00:00
parent 55b4c226d1
commit 56690b3d49
3 changed files with 10 additions and 11 deletions
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12
manifest
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@ -1,5 +1,5 @@
C Make\ssure\sthe\sname\sof\srollback\sjournal\sfiles\sare\sdouble-zero\sterminated\nwhen\sthey\sare\spassed\sinto\sthe\sVFS.
D 2012-09-15T13:39:24.735
C Performance\senhancement\sin\sthe\ssqlite3VdbeSerialType()\sroutine.
D 2012-09-17T15:36:31.241
F Makefile.arm-wince-mingw32ce-gcc d6df77f1f48d690bd73162294bbba7f59507c72f
F Makefile.in 5f4f26109f9d80829122e0e09f9cda008fa065fb
F Makefile.linux-gcc 91d710bdc4998cb015f39edf3cb314ec4f4d7e23
@ -240,7 +240,7 @@ F src/vdbe.c fd82787f9fb5bfb48dea822d41f28c2a73c25e2e
F src/vdbe.h 18f581cac1f4339ec3299f3e0cc6e11aec654cdb
F src/vdbeInt.h a668b303644377433e31a18d3d9efb87eefb6332
F src/vdbeapi.c 4c2418161cf45392ba76a7ca92f9a5f06b96f89c
F src/vdbeaux.c 9c293fd3040211687e83d5d27bef2382933146c2
F src/vdbeaux.c aeeee6c97e0c2ad31c376a781cb7462090b9827b
F src/vdbeblob.c 32f2a4899d67f69634ea4dd93e3f651936d732cb
F src/vdbemem.c cb55e84b8e2c15704968ee05f0fae25883299b74
F src/vdbesort.c 0dc1b274dcb4d4c8e71b0b2b15261f286caba39b
@ -1013,7 +1013,7 @@ F tool/vdbe-compress.tcl d70ea6d8a19e3571d7ab8c9b75cba86d1173ff0f
F tool/warnings-clang.sh f6aa929dc20ef1f856af04a730772f59283631d4
F tool/warnings.sh fbc018d67fd7395f440c28f33ef0f94420226381
F tool/win/sqlite.vsix 67d8a99aceb56384a81b3f30d6c71743146d2cc9
P a93ee09cdc15987848bf9023e69892ce9a5f989e
R ecaebb814f51bb6e38f5c9d70e5c1467
P 8711a8447d28275602287faf533de3d6e50d535d
R 34d4f192c96f51569b1d84a4c81787ab
U drh
Z a699a11a3dac3cfd2b9a3a76bfd53ddc
Z c99f61ab4f3b0b408fc647ac1fcea198

2
manifest.uuid
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@ -1 +1 @@
8711a8447d28275602287faf533de3d6e50d535d
ad298f52efd0ff123a1a4d6a0fa16fbd4c6b6dad

7
src/vdbeaux.c
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@ -2583,9 +2583,6 @@ u32 sqlite3VdbeSerialType(Mem *pMem, int file_format){
# define MAX_6BYTE ((((i64)0x00008000)<<32)-1)
i64 i = pMem->u.i;
u64 u;
if( file_format>=4 && (i&1)==i ){
return 8+(u32)i;
}
if( i<0 ){
if( i<(-MAX_6BYTE) ) return 6;
/* Previous test prevents: u = -(-9223372036854775808) */
@ -2593,7 +2590,9 @@ u32 sqlite3VdbeSerialType(Mem *pMem, int file_format){
}else{
u = i;
}
if( u<=127 ) return 1;
if( u<=127 ){
return ((i&1)==i && file_format>=4) ? 8+(u32)u : 1;
}
if( u<=32767 ) return 2;
if( u<=8388607 ) return 3;
if( u<=2147483647 ) return 4;