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Overview
| Comment: | Change a while-loop into a do-loop in sqlite3VdbeSerialPut() for a small size reduction and performance improvement. |
|---|---|
| Downloads: | Tarball | ZIP archive | SQL archive |
| Timelines: | family | ancestors | descendants | both | trunk |
| Files: | files | file ages | folders |
| SHA1: |
750bb0a0960606ab24037e0992e9f7a1 |
| User & Date: | drh 2014-08-22 13:22:32 |
Context
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2014-08-22
| ||
| 15:19 | Improve the performance and reduce the size of the sqlite3VdbeSerialGet() routine by avoiding the use of stack. (check-in: ebc10e46 user: drh tags: trunk) | |
| 14:34 | Get the sqlite3VdbeSerialGet() routine to run faster by avoiding the use of local variables. (check-in: 8267d821 user: drh tags: experimental) | |
| 13:22 | Change a while-loop into a do-loop in sqlite3VdbeSerialPut() for a small size reduction and performance improvement. (check-in: 750bb0a0 user: drh tags: trunk) | |
| 11:11 | Enhance the spellfix extension with the ability to specify a rowid when inserting new rows. (check-in: 369c480c user: drh tags: trunk) | |
Changes
Changes to src/vdbeaux.c.
2929 2929 assert( sizeof(v)==sizeof(pMem->r) ); 2930 2930 memcpy(&v, &pMem->r, sizeof(v)); 2931 2931 swapMixedEndianFloat(v); 2932 2932 }else{ 2933 2933 v = pMem->u.i; 2934 2934 } 2935 2935 len = i = sqlite3VdbeSerialTypeLen(serial_type); 2936 - while( i-- ){ 2937 - buf[i] = (u8)(v&0xFF); 2936 + assert( i>0 ); 2937 + do{ 2938 + buf[--i] = (u8)(v&0xFF); 2938 2939 v >>= 8; 2939 - } 2940 + }while( i ); 2940 2941 return len; 2941 2942 } 2942 2943 2943 2944 /* String or blob */ 2944 2945 if( serial_type>=12 ){ 2945 2946 assert( pMem->n + ((pMem->flags & MEM_Zero)?pMem->u.nZero:0) 2946 2947 == (int)sqlite3VdbeSerialTypeLen(serial_type) );