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Overview
Comment: | Very minor optimizations in the unix VFS. |
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Downloads: | Tarball | ZIP archive |
Timelines: | family | ancestors | descendants | both | trunk |
Files: | files | file ages | folders |
SHA1: |
6db3ff45bc15ece29cb2c7a736e5c6d0 |
User & Date: | drh 2015-09-01 23:51:53.351 |
Context
2015-09-02
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14:56 | The sqlite3_memory_alarm() interface has been deprecated and undocumented for almost 8 years (since version 3.5.3). Change it into a no-op. (check-in: 5d3f5df4da user: drh tags: trunk) | |
12:52 | This change is not correct for the boundary case of nCellKey==0. Was: Small performance gain and size reduction in sqlite3VdbeIdxKeyCompare(). (Closed-Leaf check-in: 6e0298cdcb user: drh tags: mistake) | |
2015-09-01
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23:51 | Very minor optimizations in the unix VFS. (check-in: 6db3ff45bc user: drh tags: trunk) | |
22:29 | Performance improvement in sqlite3VarintLen(). (check-in: adf9fefb00 user: drh tags: trunk) | |
Changes
Changes to src/os_unix.c.
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3142 3143 3144 3145 3146 3147 3148 | int prior = 0; #if (!defined(USE_PREAD) && !defined(USE_PREAD64)) i64 newOffset; #endif TIMER_START; assert( cnt==(cnt&0x1ffff) ); assert( id->h>2 ); | < | 3142 3143 3144 3145 3146 3147 3148 3149 3150 3151 3152 3153 3154 3155 | int prior = 0; #if (!defined(USE_PREAD) && !defined(USE_PREAD64)) i64 newOffset; #endif TIMER_START; assert( cnt==(cnt&0x1ffff) ); assert( id->h>2 ); do{ #if defined(USE_PREAD) got = osPread(id->h, pBuf, cnt, offset); SimulateIOError( got = -1 ); #elif defined(USE_PREAD64) got = osPread64(id->h, pBuf, cnt, offset); SimulateIOError( got = -1 ); |
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3359 3360 3361 3362 3363 3364 3365 | memcpy(&((u8 *)(pFile->pMapRegion))[offset], pBuf, nCopy); pBuf = &((u8 *)pBuf)[nCopy]; amt -= nCopy; offset += nCopy; } } #endif | | | | | 3358 3359 3360 3361 3362 3363 3364 3365 3366 3367 3368 3369 3370 3371 3372 3373 3374 3375 3376 3377 3378 3379 3380 3381 | memcpy(&((u8 *)(pFile->pMapRegion))[offset], pBuf, nCopy); pBuf = &((u8 *)pBuf)[nCopy]; amt -= nCopy; offset += nCopy; } } #endif while( (wrote = seekAndWrite(pFile, offset, pBuf, amt))<amt && wrote>0 ){ amt -= wrote; offset += wrote; pBuf = &((char*)pBuf)[wrote]; } SimulateIOError(( wrote=(-1), amt=1 )); SimulateDiskfullError(( wrote=0, amt=1 )); if( amt>wrote ){ if( wrote<0 && pFile->lastErrno!=ENOSPC ){ /* lastErrno set by seekAndWrite */ return SQLITE_IOERR_WRITE; }else{ storeLastErrno(pFile, 0); /* not a system error */ return SQLITE_FULL; } |
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