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Minor performance tweaks to the pager.

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FossilOrigin-Name: 9ae1f9ce7ea6beaeddc3711080b3796e05acc4f8
This commit is contained in:
drh
2013-08-21 22:54:55 +00:00
parent cf5ff12105
commit 9d1ab0794e
3 changed files with 16 additions and 18 deletions
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20
src/pager.c
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@@ -1022,13 +1022,17 @@ static char *print_pager_state(Pager *p){
** PagerSavepoint.pInSavepoint.
*/
static int subjRequiresPage(PgHdr *pPg){
Pgno pgno = pPg->pgno;
Pager *pPager = pPg->pPager;
PagerSavepoint *p;
Pgno pgno;
int i;
for(i=0; i<pPager->nSavepoint; i++){
PagerSavepoint *p = &pPager->aSavepoint[i];
if( p->nOrig>=pgno && 0==sqlite3BitvecTest(p->pInSavepoint, pgno) ){
return 1;
if( pPager->nSavepoint ){
pgno = pPg->pgno;
for(i=0; i<pPager->nSavepoint; i++){
p = &pPager->aSavepoint[i];
if( p->nOrig>=pgno && 0==sqlite3BitvecTest(p->pInSavepoint, pgno) ){
return 1;
}
}
}
return 0;
@@ -2874,12 +2878,6 @@ static int readDbPage(PgHdr *pPg, u32 iFrame){
assert( pPager->eState>=PAGER_READER && !MEMDB );
assert( isOpen(pPager->fd) );
if( NEVER(!isOpen(pPager->fd)) ){
assert( pPager->tempFile );
memset(pPg->pData, 0, pPager->pageSize);
return SQLITE_OK;
}
#ifndef SQLITE_OMIT_WAL
if( iFrame ){
/* Try to pull the page from the write-ahead log. */