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Performance enhancement for sqlite3DbFree().

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FossilOrigin-Name: c296a9d958ec360fc8d217363348b4918d665bccb3c4f27503a2dcef7db49052
This commit is contained in:
drh
2022-08-22 15:18:37 +00:00
parent 41ce47c4f4
commit 376860ba88
7 changed files with 45 additions and 32 deletions
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38
src/malloc.c
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@@ -317,7 +317,7 @@ void *sqlite3_malloc64(sqlite3_uint64 n){
*/
#ifndef SQLITE_OMIT_LOOKASIDE
static int isLookaside(sqlite3 *db, const void *p){
return SQLITE_WITHIN(p, db->lookaside.pStart, db->lookaside.pEnd);
return SQLITE_WITHIN(p, db->lookaside.pStart, db->lookaside.pTrueEnd);
}
#else
#define isLookaside(A,B) 0
@@ -341,18 +341,16 @@ static int lookasideMallocSize(sqlite3 *db, const void *p){
int sqlite3DbMallocSize(sqlite3 *db, const void *p){
assert( p!=0 );
#ifdef SQLITE_DEBUG
if( db==0 || !isLookaside(db,p) ){
if( db==0 ){
assert( sqlite3MemdebugNoType(p, (u8)~MEMTYPE_HEAP) );
assert( sqlite3MemdebugHasType(p, MEMTYPE_HEAP) );
}else{
assert( sqlite3MemdebugHasType(p, (MEMTYPE_LOOKASIDE|MEMTYPE_HEAP)) );
assert( sqlite3MemdebugNoType(p, (u8)~(MEMTYPE_LOOKASIDE|MEMTYPE_HEAP)) );
}
if( db==0 ){
assert( sqlite3MemdebugNoType(p, (u8)~MEMTYPE_HEAP) );
assert( sqlite3MemdebugHasType(p, MEMTYPE_HEAP) );
}else if( !isLookaside(db,p) ){
assert( sqlite3MemdebugHasType(p, (MEMTYPE_LOOKASIDE|MEMTYPE_HEAP)) );
assert( sqlite3MemdebugNoType(p, (u8)~(MEMTYPE_LOOKASIDE|MEMTYPE_HEAP)) );
}
#endif
if( db ){
if( ((uptr)p)<(uptr)(db->lookaside.pEnd) ){
if( ((uptr)p)<(uptr)(db->lookaside.pTrueEnd) ){
#ifndef SQLITE_OMIT_TWOSIZE_LOOKASIDE
if( ((uptr)p)>=(uptr)(db->lookaside.pMiddle) ){
assert( sqlite3_mutex_held(db->mutex) );
@@ -408,14 +406,11 @@ void sqlite3DbFreeNN(sqlite3 *db, void *p){
assert( db==0 || sqlite3_mutex_held(db->mutex) );
assert( p!=0 );
if( db ){
if( db->pnBytesFreed ){
measureAllocationSize(db, p);
return;
}
if( ((uptr)p)<(uptr)(db->lookaside.pEnd) ){
#ifndef SQLITE_OMIT_TWOSIZE_LOOKASIDE
if( ((uptr)p)>=(uptr)(db->lookaside.pMiddle) ){
LookasideSlot *pBuf = (LookasideSlot*)p;
assert( db->pnBytesFreed==0 );
#ifdef SQLITE_DEBUG
memset(p, 0xaa, LOOKASIDE_SMALL); /* Trash freed content */
#endif
@@ -426,6 +421,7 @@ void sqlite3DbFreeNN(sqlite3 *db, void *p){
#endif /* SQLITE_OMIT_TWOSIZE_LOOKASIDE */
if( ((uptr)p)>=(uptr)(db->lookaside.pStart) ){
LookasideSlot *pBuf = (LookasideSlot*)p;
assert( db->pnBytesFreed==0 );
#ifdef SQLITE_DEBUG
memset(p, 0xaa, db->lookaside.szTrue); /* Trash freed content */
#endif
@@ -434,6 +430,10 @@ void sqlite3DbFreeNN(sqlite3 *db, void *p){
return;
}
}
if( db->pnBytesFreed ){
measureAllocationSize(db, p);
return;
}
}
assert( sqlite3MemdebugHasType(p, (MEMTYPE_LOOKASIDE|MEMTYPE_HEAP)) );
assert( sqlite3MemdebugNoType(p, (u8)~(MEMTYPE_LOOKASIDE|MEMTYPE_HEAP)) );
@@ -445,14 +445,11 @@ void sqlite3DbNNFreeNN(sqlite3 *db, void *p){
assert( db!=0 );
assert( sqlite3_mutex_held(db->mutex) );
assert( p!=0 );
if( db->pnBytesFreed ){
measureAllocationSize(db, p);
return;
}
if( ((uptr)p)<(uptr)(db->lookaside.pEnd) ){
#ifndef SQLITE_OMIT_TWOSIZE_LOOKASIDE
if( ((uptr)p)>=(uptr)(db->lookaside.pMiddle) ){
LookasideSlot *pBuf = (LookasideSlot*)p;
assert( db->pnBytesFreed==0 );
#ifdef SQLITE_DEBUG
memset(p, 0xaa, LOOKASIDE_SMALL); /* Trash freed content */
#endif
@@ -463,6 +460,7 @@ void sqlite3DbNNFreeNN(sqlite3 *db, void *p){
#endif /* SQLITE_OMIT_TWOSIZE_LOOKASIDE */
if( ((uptr)p)>=(uptr)(db->lookaside.pStart) ){
LookasideSlot *pBuf = (LookasideSlot*)p;
assert( db->pnBytesFreed==0 );
#ifdef SQLITE_DEBUG
memset(p, 0xaa, db->lookaside.szTrue); /* Trash freed content */
#endif
@@ -471,6 +469,10 @@ void sqlite3DbNNFreeNN(sqlite3 *db, void *p){
return;
}
}
if( db->pnBytesFreed ){
measureAllocationSize(db, p);
return;
}
assert( sqlite3MemdebugHasType(p, (MEMTYPE_LOOKASIDE|MEMTYPE_HEAP)) );
assert( sqlite3MemdebugNoType(p, (u8)~(MEMTYPE_LOOKASIDE|MEMTYPE_HEAP)) );
sqlite3MemdebugSetType(p, MEMTYPE_HEAP);