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Small performance improvement to the dirty list handling in the pager.

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FossilOrigin-Name: b332a84d5154f70f3197537df4af243eaebbb011
This commit is contained in:
drh
2014-09-12 20:30:59 +00:00
parent 236241aeb0
commit 36ce91913c
3 changed files with 14 additions and 14 deletions
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14
src/pcache.c
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@@ -116,14 +116,14 @@ static void pcacheManageDirtyList(PgHdr *pPage, u8 addRemove){
if( pPage->pDirtyNext ){
assert( pPage->pDirtyNext->pDirtyPrev==0 );
pPage->pDirtyNext->pDirtyPrev = pPage;
}else if( p->bPurgeable ){
assert( p->eCreate==2 );
p->eCreate = 1;
}else{
p->pDirtyTail = pPage;
if( p->bPurgeable ){
assert( p->eCreate==2 );
p->eCreate = 1;
}
}
p->pDirty = pPage;
if( !p->pDirtyTail ){
p->pDirtyTail = pPage;
}
if( !p->pSynced && 0==(pPage->flags&PGHDR_NEED_SYNC) ){
p->pSynced = pPage;
}
@@ -399,7 +399,7 @@ void SQLITE_NOINLINE sqlite3PcacheRelease(PgHdr *p){
p->pCache->nRef--;
if( (p->flags&PGHDR_DIRTY)==0 ){
pcacheUnpin(p);
}else{
}else if( p->pDirtyPrev!=0 ){
/* Move the page to the head of the dirty list. */
pcacheManageDirtyList(p, PCACHE_DIRTYLIST_FRONT);
}