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Overview
Comment: | Performance enhancement in the sqlite3VdbeSerialType() routine. |
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Downloads: | Tarball | ZIP archive |
Timelines: | family | ancestors | descendants | both | trunk |
Files: | files | file ages | folders |
SHA1: |
ad298f52efd0ff123a1a4d6a0fa16fbd |
User & Date: | drh 2012-09-17 15:36:31.241 |
Context
2012-09-17
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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: 45793f0b84 user: drh tags: trunk) | |
15:36 | Performance enhancement in the sqlite3VdbeSerialType() routine. (check-in: ad298f52ef user: drh tags: trunk) | |
2012-09-15
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13:39 | Make sure the name of rollback journal files are double-zero terminated when they are passed into the VFS. (check-in: 8711a8447d user: drh tags: trunk) | |
Changes
Changes to src/vdbeaux.c.
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2579 2580 2581 2582 2583 2584 2585 | 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; | < < < | > > | 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 ){ |
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