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Minor performance optimizations in pager.c.

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FossilOrigin-Name: ba9eef5f5293633d1479e1d877bf338edb2a9471
This commit is contained in:
drh
2013-12-09 19:25:28 +00:00
parent a6353a3f64
commit c65faab2e1
3 changed files with 11 additions and 17 deletions
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14
src/pager.c
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@@ -5643,14 +5643,8 @@ static int pager_write(PgHdr *pPg){
|| pPager->eState==PAGER_WRITER_DBMOD
);
assert( assert_pager_state(pPager) );
/* If an error has been previously detected, report the same error
** again. This should not happen, but the check provides robustness. */
if( NEVER(pPager->errCode) ) return pPager->errCode;
/* Higher-level routines never call this function if database is not
** writable. But check anyway, just for robustness. */
if( NEVER(pPager->readOnly) ) return SQLITE_PERM;
assert( pPager->errCode==0 );
assert( pPager->readOnly==0 );
CHECK_PAGE(pPg);
@@ -5779,19 +5773,19 @@ int sqlite3PagerWrite(DbPage *pDbPage){
PgHdr *pPg = pDbPage;
Pager *pPager = pPg->pPager;
Pgno nPagePerSector = (pPager->sectorSize/pPager->pageSize);
assert( (pPg->flags & PGHDR_MMAP)==0 );
assert( pPager->eState>=PAGER_WRITER_LOCKED );
assert( pPager->eState!=PAGER_ERROR );
assert( assert_pager_state(pPager) );
if( nPagePerSector>1 ){
if( pPager->sectorSize > pPager->pageSize ){
Pgno nPageCount; /* Total number of pages in database file */
Pgno pg1; /* First page of the sector pPg is located on. */
int nPage = 0; /* Number of pages starting at pg1 to journal */
int ii; /* Loop counter */
int needSync = 0; /* True if any page has PGHDR_NEED_SYNC */
Pgno nPagePerSector = (pPager->sectorSize/pPager->pageSize);
/* Set the doNotSpill NOSYNC bit to 1. This is because we cannot allow
** a journal header to be written between the pages journaled by