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Remove two lines of unnecessary code, for a very small performance increase

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and size decrease.

FossilOrigin-Name: 15824ccda0f110794a479b58fbf36082d8c383f34bae9dc0921d96547fb37869
This commit is contained in:
drh
2018-12-03 01:58:02 +00:00
parent 4a5cff73a7
commit de72d2a81a
3 changed files with 13 additions and 10 deletions
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9
src/pcache1.c
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@@ -102,6 +102,7 @@ struct PgHdr1 {
PCache1 *pCache; /* Cache that currently owns this page */
PgHdr1 *pLruNext; /* Next in LRU list of unpinned pages */
PgHdr1 *pLruPrev; /* Previous in LRU list of unpinned pages */
/* NB: pLruPrev is only valid if pLruNext!=0 */
};
/*
@@ -570,7 +571,8 @@ static PgHdr1 *pcache1PinPage(PgHdr1 *pPage){
pPage->pLruPrev->pLruNext = pPage->pLruNext;
pPage->pLruNext->pLruPrev = pPage->pLruPrev;
pPage->pLruNext = 0;
pPage->pLruPrev = 0;
/* pPage->pLruPrev = 0;
** No need to clear pLruPrev as it is never accessed if pLruNext is 0 */
assert( pPage->isAnchor==0 );
assert( pPage->pCache->pGroup->lru.isAnchor==1 );
pPage->pCache->nRecyclable--;
@@ -908,8 +910,9 @@ static SQLITE_NOINLINE PgHdr1 *pcache1FetchStage2(
pPage->iKey = iKey;
pPage->pNext = pCache->apHash[h];
pPage->pCache = pCache;
pPage->pLruPrev = 0;
pPage->pLruNext = 0;
/* pPage->pLruPrev = 0;
** No need to clear pLruPrev since it is not accessed when pLruNext==0 */
*(void **)pPage->page.pExtra = 0;
pCache->apHash[h] = pPage;
if( iKey>pCache->iMaxKey ){
@@ -1069,7 +1072,7 @@ static void pcache1Unpin(
/* It is an error to call this function if the page is already
** part of the PGroup LRU list.
*/
assert( pPage->pLruPrev==0 && pPage->pLruNext==0 );
assert( pPage->pLruNext==0 );
assert( PAGE_IS_PINNED(pPage) );
if( reuseUnlikely || pGroup->nPurgeable>pGroup->nMaxPage ){