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Add the new internal interface sqlite3DbNNFreeNN(db,ptr) where both the

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db and ptr parameters are guaranteed to be non-NULL.  Use this where
appropriate to save more than 2 million CPU cycles on the standard
performance test.

FossilOrigin-Name: e5eaa80e81fdf86f2875a912b880272b8d099b82b08e945a7988c5dd0fe9d6b5
This commit is contained in:
drh
2022-08-22 02:00:26 +00:00
parent 05cb948bf7
commit 41ce47c4f4
18 changed files with 128 additions and 69 deletions
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3
src/fkey.c
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@@ -1439,11 +1439,12 @@ void sqlite3FkDelete(sqlite3 *db, Table *pTab){
FKey *pNext; /* Copy of pFKey->pNextFrom */
assert( IsOrdinaryTable(pTab) );
assert( db!=0 );
for(pFKey=pTab->u.tab.pFKey; pFKey; pFKey=pNext){
assert( db==0 || sqlite3SchemaMutexHeld(db, 0, pTab->pSchema) );
/* Remove the FK from the fkeyHash hash table. */
if( !db || db->pnBytesFreed==0 ){
if( db->pnBytesFreed==0 ){
if( pFKey->pPrevTo ){
pFKey->pPrevTo->pNextTo = pFKey->pNextTo;
}else{