Many hyperlinks are disabled.
Use anonymous login
to enable hyperlinks.
Overview
| Comment: | Performance enhancement in the sqlite3VdbeSerialType() routine. |
|---|---|
| Downloads: | Tarball | ZIP archive | SQL archive |
| Timelines: | family | ancestors | descendants | both | trunk |
| Files: | files | file ages | folders |
| SHA1: |
ad298f52efd0ff123a1a4d6a0fa16fbd |
| User & Date: | drh 2012-09-17 15:36:31 |
Context
|
2012-09-17
| ||
| 17:16 | Make sure the KeyInfo.aSortOrder array is always allocated so that we never have to test for KeyInfo.aSortOrder==0 in performance-critical loops. (check-in: 45793f0b user: drh tags: trunk) | |
| 15:36 | Performance enhancement in the sqlite3VdbeSerialType() routine. (check-in: ad298f52 user: drh tags: trunk) | |
|
2012-09-15
| ||
| 13:39 | Make sure the name of rollback journal files are double-zero terminated when they are passed into the VFS. (check-in: 8711a844 user: drh tags: trunk) | |
Changes
Changes to src/vdbeaux.c.
2579 2580 2581 2582 2583 2584 2585 2586 2587 2588 2589 2590 2591 2592 2593 2594 2595 2596 2597 2598 2599 2600 2601 2602 2603 |
return 0;
}
if( flags&MEM_Int ){
/* Figure out whether to use 1, 2, 4, 6 or 8 bytes. */
# 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) */
u = -i;
}else{
u = i;
}
if( u<=127 ) return 1;
if( u<=32767 ) return 2;
if( u<=8388607 ) return 3;
if( u<=2147483647 ) return 4;
if( u<=MAX_6BYTE ) return 5;
return 6;
}
if( flags&MEM_Real ){
|
< < < | > > |
2579 2580 2581 2582 2583 2584 2585 2586 2587 2588 2589 2590 2591 2592 2593 2594 2595 2596 2597 2598 2599 2600 2601 2602 |
return 0;
}
if( flags&MEM_Int ){
/* Figure out whether to use 1, 2, 4, 6 or 8 bytes. */
# define MAX_6BYTE ((((i64)0x00008000)<<32)-1)
i64 i = pMem->u.i;
u64 u;
if( i<0 ){
if( i<(-MAX_6BYTE) ) return 6;
/* Previous test prevents: u = -(-9223372036854775808) */
u = -i;
}else{
u = i;
}
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;
if( u<=MAX_6BYTE ) return 5;
return 6;
}
if( flags&MEM_Real ){
|