diff --git a/mozilla/lib/mac/MacMemoryAllocator/src/nsAllocatorManager.cp b/mozilla/lib/mac/MacMemoryAllocator/src/nsAllocatorManager.cp
index fcaf4a6df61..26eaf85468b 100644
--- a/mozilla/lib/mac/MacMemoryAllocator/src/nsAllocatorManager.cp
+++ b/mozilla/lib/mac/MacMemoryAllocator/src/nsAllocatorManager.cp
@@ -16,6 +16,7 @@
  * Reserved. */
 
 #include <stdlib.h>
+#include <string.h>
 
 #include <new.h>			// for placement new
 
@@ -25,6 +26,10 @@
 #include <Processes.h>
 #include <CodeFragments.h>
 
+#if __profile__
+#include <Profiler.h>
+#endif
+
 #include "nsMemAllocator.h"
 
 #include "nsFixedSizeAllocator.h"
@@ -52,48 +57,106 @@ pascal void __MemTerminate(void);
 
 
 //--------------------------------------------------------------------
-class nsAllocatorManager
+nsHeapZoneHeader::nsHeapZoneHeader(Ptr zonePtr, Size ptrSize)
+:	mNextHeapZone(nil)
+,	mZoneHandle(nil)
+,	mChunkCount(0)
+,	mHeapZone(nil)
+#if DEBUG_HEAP_INTEGRITY
+,	mSignature(kHeapZoneSignature)
+#endif
+// This ctor is used for zones in our heap, which are allocated with
+// NewPtr
+//--------------------------------------------------------------------
 {
-	public:
+	SetupHeapZone(zonePtr, ptrSize);
+}
 
-		static const SInt32			kNumMasterPointerBlocks;
-		static const SInt32			kApplicationStackSizeIncrease;
-		static const SInt32			kHeapZoneHeapPercentage;
-
-									nsAllocatorManager();
-									~nsAllocatorManager();
-									
-		static OSErr				InitializeMacMemory(SInt32 inNumMasterPointerBlocks,
-															SInt32 inAppStackSizeInc);
-
-		
-		nsMemAllocator*				GetAllocatorForBlockSize(size_t blockSize);
-
-		static nsAllocatorManager*	GetAllocatorManager();
-		
-	protected:
-	
-		static nsAllocatorManager	*sAllocatorManager;		
-		
-	private:
-	
-		SInt32						mNumFixedSizeAllocators;
-		SInt32						mNumSmallBlockAllocators;
-		
-		UInt32						mMinSmallBlockSize;			// blocks >= this size come out of the small block allocator
-		UInt32						mMinLargeBlockSize;			// blocks >= this size come out of the large allocator
-		
-		nsMemAllocator**			mFixedSizeAllocators;		// array of pointers to allocator objects
-		nsMemAllocator**			mSmallBlockAllocators;		// array of pointers to allocator objects
-	
-		nsMemAllocator*				mLargeAllocator;
-
-		THz							mHeapZone;					// the heap zone for our memory heaps
-
-};
 
 //--------------------------------------------------------------------
+nsHeapZoneHeader::nsHeapZoneHeader(Handle zoneHandle, Size handleSize)
+:	mNextHeapZone(nil)
+,	mZoneHandle(zoneHandle)
+,	mChunkCount(0)
+,	mHeapZone(nil)
+#if DEBUG_HEAP_INTEGRITY
+,	mSignature(kHeapZoneSignature)
+#endif
+// This ctor is used for zones in temporary memory, which are allocated
+// with TempNewHandle
+//--------------------------------------------------------------------
+{
+	// handle should be locked here
+	SetupHeapZone(*zoneHandle, handleSize);
+}
 
+//--------------------------------------------------------------------
+nsHeapZoneHeader::~nsHeapZoneHeader()
+//--------------------------------------------------------------------
+{
+	if (mZoneHandle)
+		::DisposeHandle(mZoneHandle);
+	else
+		::DisposePtr((Ptr)this);
+		
+	MEM_ASSERT(::MemError() == noErr, "Error on Mac memory dispose");
+}
+
+
+//--------------------------------------------------------------------
+void nsHeapZoneHeader::SetupHeapZone(Ptr zonePtr, Size ptrSize)
+//--------------------------------------------------------------------
+{
+	Ptr		zoneStart = zonePtr + sizeof(nsHeapZoneHeader);
+	Ptr		endZone = zonePtr + ptrSize;
+	
+	::InitZone(nil, kHeapZoneMasterPointers, endZone, zoneStart);
+	
+	mHeapZone = (THz)zoneStart;
+	
+	// set the current zone back to the application zone, because InitZone changes it
+	::SetZone(::ApplicationZone());
+}
+
+
+//--------------------------------------------------------------------
+Ptr nsHeapZoneHeader::AllocateZonePtr(Size ptrSize)
+//--------------------------------------------------------------------
+{
+	::SetZone(mHeapZone);
+	Ptr		thePtr = ::NewPtr(ptrSize);
+	::SetZone(::ApplicationZone());
+
+	mChunkCount += (thePtr != nil);
+	
+	return thePtr;
+}
+
+
+//--------------------------------------------------------------------
+void nsHeapZoneHeader::DisposeZonePtr(Ptr thePtr, Boolean &outWasLastChunk)
+//--------------------------------------------------------------------
+{
+	MEM_ASSERT(::PtrZone(thePtr) == mHeapZone, "Ptr disposed from wrong zone!");
+	::DisposePtr(thePtr);
+	mChunkCount --;
+	outWasLastChunk = (mChunkCount == 0);
+}
+
+
+//--------------------------------------------------------------------
+/* static */ nsHeapZoneHeader* nsHeapZoneHeader::GetZoneFromPtr(Ptr subheapPtr)
+//--------------------------------------------------------------------
+{
+	THz		ptrZone = ::PtrZone(subheapPtr);
+	MEM_ASSERT(ptrZone && (::MemError() == noErr), "Problem getting zone from ptr");
+	
+	return (nsHeapZoneHeader *)((char *)ptrZone - sizeof(nsHeapZoneHeader));
+}
+
+
+
+#pragma mark -
 
 
 const SInt32	nsAllocatorManager::kNumMasterPointerBlocks = 30;
@@ -103,10 +166,12 @@ const SInt32	nsAllocatorManager::kHeapZoneHeapPercentage = 60;
 nsAllocatorManager* 	nsAllocatorManager::sAllocatorManager = nil;
 
 //--------------------------------------------------------------------
-nsAllocatorManager::nsAllocatorManager() :
-	mFixedSizeAllocators(nil),
-	mSmallBlockAllocators(nil),
-	mLargeAllocator(nil)
+nsAllocatorManager::nsAllocatorManager()
+:	mFixedSizeAllocators(nil)
+,	mSmallBlockAllocators(nil)
+,	mLargeAllocator(nil)
+,	mFirstHeapZone(nil)
+,	mLastHeapZone(nil)
 //--------------------------------------------------------------------
 {
 	mMinSmallBlockSize = 44;			// some magic numbers for now
@@ -129,6 +194,7 @@ nsAllocatorManager::nsAllocatorManager() :
 		mFixedSizeAllocators[i] = (nsMemAllocator *)NewPtr(sizeof(nsFixedSizeAllocator));
 		if (mFixedSizeAllocators[i] == nil)
 			throw((OSErr)memFullErr);
+		new (mFixedSizeAllocators[i]) nsFixedSizeAllocator((i + 1) * 4);
 	}
 
 	for (SInt32 i = 0; i < mNumSmallBlockAllocators; i ++)
@@ -136,11 +202,13 @@ nsAllocatorManager::nsAllocatorManager() :
 		mSmallBlockAllocators[i] = (nsMemAllocator *)NewPtr(sizeof(nsSmallHeapAllocator));
 		if (mSmallBlockAllocators[i] == nil)
 			throw((OSErr)memFullErr);
+		new (mSmallBlockAllocators[i]) nsSmallHeapAllocator();
 	}
 	
 	mLargeAllocator = (nsMemAllocator *)NewPtr(sizeof(nsLargeHeapAllocator));
 	if (mLargeAllocator == nil)
 		throw((OSErr)memFullErr);
+	new (mLargeAllocator) nsLargeHeapAllocator();
 	
 	// make the heap zone for our subheaps
 	UInt32		heapZoneSize;
@@ -148,30 +216,10 @@ nsAllocatorManager::nsAllocatorManager() :
 	heapZoneSize = ( kHeapZoneHeapPercentage * ::FreeMem() ) / 100;
 	heapZoneSize = ( ( heapZoneSize + 3 ) & ~3 );		// round up to a multiple of 4 bytes
 
-	Ptr			heapZone = ::NewPtr(heapZoneSize);
-	if (heapZone == nil)
+	nsHeapZoneHeader	*firstZone = MakeNewHeapZone(heapZoneSize, heapZoneSize);
+	if (!firstZone)
 		throw((OSErr)memFullErr);
-
-#define kNumMasterPointers		24		// does not matter, since we won't be allocating handles
-										// in this heap zone
-										
-	Ptr			endZone = heapZone + heapZoneSize;
-	::InitZone(nil, kNumMasterPointers, endZone, heapZone);
 	
-	// set the current zone back to the application zone
-	::SetZone(::ApplicationZone());
-	
-	mHeapZone = (THz)heapZone;
-	
-	// now we have the heap zone, call (placement) new on our allocators
-	for (SInt32 i = 0; i < mNumFixedSizeAllocators; i ++)
-		new (mFixedSizeAllocators[i]) nsFixedSizeAllocator(mHeapZone, (i + 1) * 4);
-
-	for (SInt32 i = 0; i < mNumSmallBlockAllocators; i ++)
-		new (mSmallBlockAllocators[i]) nsSmallHeapAllocator(mHeapZone);
-	
-	new (mLargeAllocator) nsLargeHeapAllocator(mHeapZone);
-
 }
 
 //--------------------------------------------------------------------
@@ -215,6 +263,131 @@ nsMemAllocator* nsAllocatorManager::GetAllocatorForBlockSize(size_t blockSize)
 	return mLargeAllocator;
 }
 
+//--------------------------------------------------------------------
+nsHeapZoneHeader* nsAllocatorManager::MakeNewHeapZone(Size zoneSize, Size minZoneSize)
+//--------------------------------------------------------------------
+{
+	if (mFirstHeapZone == nil)
+	{
+		Ptr	firstZonePtr = ::NewPtr(zoneSize);
+		
+		if (!firstZonePtr) return nil;
+
+		mFirstHeapZone = new (firstZonePtr) nsHeapZoneHeader(firstZonePtr, zoneSize);
+		mLastHeapZone = mFirstHeapZone;
+	}
+	else
+	{
+		OSErr		err;
+		Handle		tempMemHandle = ::TempNewHandle(zoneSize, &err);
+		
+		while (!tempMemHandle && zoneSize > minZoneSize)
+		{
+			zoneSize -= (128 * 1024);
+			tempMemHandle = ::TempNewHandle(zoneSize, &err);
+		}
+	
+		if (!tempMemHandle) return nil;
+	
+		// first, lock the handle hi
+		HLockHi(tempMemHandle);
+	
+		nsHeapZoneHeader	*newZone = new (*tempMemHandle) nsHeapZoneHeader(tempMemHandle, zoneSize);
+		mLastHeapZone->SetNextZone(newZone);
+		mLastHeapZone = newZone;
+	}
+
+	return mLastHeapZone;
+}
+
+
+// block size multiple. All blocks should be multiples of this size,
+// to reduce heap fragmentation
+const Size nsAllocatorManager::kChunkSizeMultiple 	= 2 * 1024;
+const Size nsAllocatorManager::kMacMemoryPtrOvehead	= 16;							// this overhead is documented in IM:Memory 2-22
+const Size nsAllocatorManager::kTempMemHeapZoneSize	= 1024 * 1024;		// 1MB temp handles
+const Size nsAllocatorManager::kTempMemHeapMinZoneSize	= 256 * 1024;	// min 256K handle
+
+
+//--------------------------------------------------------------------
+Ptr nsAllocatorManager::AllocateSubheap(Size preferredSize, Size &outActualSize)
+//--------------------------------------------------------------------
+{
+	nsHeapZoneHeader		*thisHeapZone = mFirstHeapZone;
+	
+	// calculate an ideal chunk size by rounding up
+	preferredSize = kChunkSizeMultiple * ((preferredSize + (kChunkSizeMultiple - 1)) / kChunkSizeMultiple);
+	
+	// take into accound the memory manager's pointer overhead (16 btyes), to avoid fragmentation
+	preferredSize += ((preferredSize / kChunkSizeMultiple) - 1) * kMacMemoryPtrOvehead;
+	outActualSize = preferredSize;
+
+	while (thisHeapZone)
+	{
+		Ptr		subheapPtr = thisHeapZone->AllocateZonePtr(preferredSize);
+		if (subheapPtr)
+			return subheapPtr;
+	
+		thisHeapZone = thisHeapZone->GetNextZone();
+	}
+
+	// we failed to allocate. Let's make a new heap zone
+	thisHeapZone = MakeNewHeapZone(kTempMemHeapZoneSize, kTempMemHeapMinZoneSize);
+	if (thisHeapZone)
+		return thisHeapZone->AllocateZonePtr(preferredSize);
+		
+	return nil;
+}
+
+
+//--------------------------------------------------------------------
+void nsAllocatorManager::FreeSubheap(Ptr subheapPtr)
+//--------------------------------------------------------------------
+{
+	nsHeapZoneHeader		*ptrHeapZone = nsHeapZoneHeader::GetZoneFromPtr(subheapPtr);
+	
+#if DEBUG_HEAP_INTEGRITY
+	MEM_ASSERT(ptrHeapZone->IsGoodZone(), "Got bad heap zone header");
+#endif
+	
+	Boolean					lastChunk;
+	ptrHeapZone->DisposeZonePtr(subheapPtr, lastChunk);
+	
+	if (lastChunk)
+	{
+		// remove from the list
+		nsHeapZoneHeader		*prevZone = nil;
+		nsHeapZoneHeader		*nextZone = nil;
+		nsHeapZoneHeader		*thisZone = mFirstHeapZone;
+			
+		while (thisZone)
+		{
+			nextZone = thisZone->GetNextZone();
+			
+			if (thisZone == ptrHeapZone)
+				break;
+			
+			prevZone = thisZone;
+			thisZone = nextZone;
+		}
+		
+		if (thisZone)
+		{
+			if (prevZone)
+				prevZone->SetNextZone(nextZone);
+			
+			if (mFirstHeapZone == thisZone)
+				mFirstHeapZone = nextZone;
+			
+			if (mLastHeapZone == thisZone)
+				mLastHeapZone = prevZone;
+		}
+		
+		// dispose it
+		ptrHeapZone->~nsHeapZoneHeader();		// this disposes the ptr/handle
+	}
+}
+
 
 //--------------------------------------------------------------------
 /* static */ OSErr nsAllocatorManager::InitializeMacMemory(SInt32 inNumMasterPointerBlocks,
@@ -258,7 +431,7 @@ nsMemAllocator* nsAllocatorManager::GetAllocatorForBlockSize(size_t blockSize)
 
 
 //--------------------------------------------------------------------
-/* static */ nsAllocatorManager * nsAllocatorManager::GetAllocatorManager()
+/* static */ nsAllocatorManager * nsAllocatorManager::CreateAllocatorManager()
 //--------------------------------------------------------------------
 {
 	if (sAllocatorManager) return sAllocatorManager;
@@ -269,6 +442,57 @@ nsMemAllocator* nsAllocatorManager::GetAllocatorForBlockSize(size_t blockSize)
 	return sAllocatorManager;
 }
 
+
+
+#if STATS_MAC_MEMORY
+//--------------------------------------------------------------------
+void nsAllocatorManager::DumpMemoryStats()
+//--------------------------------------------------------------------
+{
+	UInt32			i;
+	char			outString[ 1024 ];
+	PRFileDesc		*outFile;
+	
+	// Enter a valid, UNIX-style full path on your system to get this
+	// to work.
+	outFile = PR_Open("/System/MemoryStats.txt", PR_RDWR | PR_CREATE_FILE | PR_TRUNCATE, 0644);
+	if ( outFile == NULL )
+	{
+		return;
+	}
+
+	for (i = 0; i < mNumFixedSizeAllocators; i ++)
+	{
+		mFixedSizeAllocators[i]->DumpMemoryStats(outFile);
+	}
+
+	for (i = 0; i < mNumSmallBlockAllocators; i ++)
+	{
+		mSmallBlockAllocators[i]->DumpMemoryStats(outFile);
+	}
+	
+	mLargeAllocator->DumpMemoryStats(outFile);
+	
+	PR_Close(outFile);
+}
+
+
+//--------------------------------------------------------------------
+void WriteString(PRFileDesc *file, const char * string)
+//--------------------------------------------------------------------
+{
+	long	len;
+	long	bytesWritten;
+	
+	len = strlen ( string );
+	if ( len >= 1024 ) Debugger();
+	bytesWritten = PR_Write(file, string, len);
+}
+
+
+#endif
+
+
 #pragma mark -
 
 
@@ -348,13 +572,11 @@ void *calloc(size_t nele, size_t elesize)
 
 #pragma mark -
 
-#if 0
-
 /*----------------------------------------------------------------------------
 	__MemInitialize 
 	
 	Note the people can call malloc() or new() before we come here,
-	so we only initialize the memory if we've not alredy done it.s
+	so we can't rely on this being called before we do allocation.
 	
 ----------------------------------------------------------------------------*/
 pascal OSErr __MemInitialize(const CFragInitBlock *theInitBlock)
@@ -389,9 +611,11 @@ pascal void __MemTerminate(void)
 	ProfilerTerm();
 #endif
 
+#if STATS_MAC_MEMORY
+	nsAllocatorManager::GetAllocatorManager()->DumpMemoryStats();
+#endif
+	
 	__terminate();
 }
 
-#endif
-
 
diff --git a/mozilla/lib/mac/MacMemoryAllocator/src/nsAllocatorManager.h b/mozilla/lib/mac/MacMemoryAllocator/src/nsAllocatorManager.h
index 5698fc76cd2..191d4493bb5 100644
--- a/mozilla/lib/mac/MacMemoryAllocator/src/nsAllocatorManager.h
+++ b/mozilla/lib/mac/MacMemoryAllocator/src/nsAllocatorManager.h
@@ -18,7 +18,9 @@
 
 #include <MacTypes.h>
 
-
+#if STATS_MAC_MEMORY
+#include "prio.h"
+#endif
 
 #ifdef __cplusplus
 extern "C" {
@@ -30,6 +32,123 @@ void* realloc(void* block, size_t newSize);
 void *calloc(size_t nele, size_t elesize);
 
 
+#if STATS_MAC_MEMORY
+void WriteString(PRFileDesc *file, const char * string);
+#endif
+
+
 #ifdef __cplusplus
 }
 #endif
+
+
+//--------------------------------------------------------------------
+class nsHeapZoneHeader
+{
+	public:
+	
+								nsHeapZoneHeader(Ptr zonePtr, Size ptrSize);
+								nsHeapZoneHeader(Handle zoneHandle, Size handleSize);
+								~nsHeapZoneHeader();
+								
+		nsHeapZoneHeader *		GetNextZone()							{ return mNextHeapZone;	}
+		void					SetNextZone(nsHeapZoneHeader *nextZone)	{ mNextHeapZone = nextZone; }
+
+		Ptr						AllocateZonePtr(Size ptrSize);
+		void					DisposeZonePtr(Ptr thePtr, Boolean &outWasLastChunk);
+		
+#if DEBUG_HEAP_INTEGRITY
+		Boolean					IsGoodZone()	{ return (mSignature == kHeapZoneSignature); }
+#endif
+
+		static nsHeapZoneHeader*	GetZoneFromPtr(Ptr subheapPtr);
+		
+	protected:
+
+		void					SetupHeapZone(Ptr zonePtr, Size zoneSize);		
+		
+		enum
+		{
+			kHeapZoneMasterPointers = 24			// this number doesn't really matter, because we never
+													// allocate handles in our heap zones
+		};
+
+		
+#if DEBUG_HEAP_INTEGRITY
+		enum {
+			kHeapZoneSignature = 'HZne'
+		};
+
+		OSType					mSignature;
+#endif
+		
+		nsHeapZoneHeader		*mNextHeapZone;
+		Handle					mZoneHandle;		// the handle containing the zone. Nil if Ptr in app heap
+		UInt32					mChunkCount;		// how many chunks are allocated in this zone
+		THz						mHeapZone;
+};
+
+
+
+
+class nsAllocatorManager
+{
+	public:
+
+		static const SInt32			kNumMasterPointerBlocks;
+		static const SInt32			kApplicationStackSizeIncrease;
+		
+		static const SInt32			kHeapZoneHeapPercentage;
+		static const SInt32			kTempMemHeapZoneSize;
+		static const SInt32			kTempMemHeapMinZoneSize;
+		
+		static const Size			kChunkSizeMultiple;
+
+		static nsAllocatorManager*	GetAllocatorManager()	{ return sAllocatorManager ? sAllocatorManager : CreateAllocatorManager(); }
+
+									nsAllocatorManager();
+									~nsAllocatorManager();
+									
+		static OSErr				InitializeMacMemory(SInt32 inNumMasterPointerBlocks,
+															SInt32 inAppStackSizeInc);
+		
+		nsMemAllocator*				GetAllocatorForBlockSize(size_t blockSize);
+
+		
+		Ptr							AllocateSubheap(Size preferredSize, Size &outActualSize);
+		void						FreeSubheap(Ptr subheapPtr);		
+
+#if STATS_MAC_MEMORY
+		void						DumpMemoryStats();
+#endif
+
+	protected:
+	
+		static nsAllocatorManager *	CreateAllocatorManager();
+
+		static const Size			kMacMemoryPtrOvehead;
+
+		nsHeapZoneHeader *			MakeNewHeapZone(Size zoneSize, Size minZoneSize);
+		
+	private:
+	
+		SInt32						mNumFixedSizeAllocators;
+		SInt32						mNumSmallBlockAllocators;
+		
+		UInt32						mMinSmallBlockSize;			// blocks >= this size come out of the small block allocator
+		UInt32						mMinLargeBlockSize;			// blocks >= this size come out of the large allocator
+		
+		nsMemAllocator**			mFixedSizeAllocators;		// array of pointers to allocator objects
+		nsMemAllocator**			mSmallBlockAllocators;		// array of pointers to allocator objects
+	
+		nsMemAllocator*				mLargeAllocator;
+
+		nsHeapZoneHeader*			mFirstHeapZone;				// first of a linked list of heap zones
+		nsHeapZoneHeader*			mLastHeapZone;				// last of a linked list of heap zones
+		
+		THz							mHeapZone;					// the heap zone for our memory heaps
+
+		static nsAllocatorManager	*sAllocatorManager;		
+
+};
+
diff --git a/mozilla/lib/mac/MacMemoryAllocator/src/nsFixedSizeAllocator.cp b/mozilla/lib/mac/MacMemoryAllocator/src/nsFixedSizeAllocator.cp
index 0b5e54dfdb8..cf8de98a030 100644
--- a/mozilla/lib/mac/MacMemoryAllocator/src/nsFixedSizeAllocator.cp
+++ b/mozilla/lib/mac/MacMemoryAllocator/src/nsFixedSizeAllocator.cp
@@ -20,17 +20,19 @@
 #include <MacMemory.h>
 
 #include "nsMemAllocator.h"
+#include "nsAllocatorManager.h"
 #include "nsFixedSizeAllocator.h"
 
 const UInt32 FixedMemoryBlock::kFixedSizeBlockOverhead = sizeof(FixedMemoryBlockHeader) + MEMORY_BLOCK_TAILER_SIZE;
 
 //--------------------------------------------------------------------
-nsFixedSizeAllocator::nsFixedSizeAllocator(THz heapZone, size_t blockSize)
-:	nsMemAllocator(heapZone)
+nsFixedSizeAllocator::nsFixedSizeAllocator(size_t blockSize)
+:	nsMemAllocator()
 ,	mBlockSize(blockSize)
+,	mChunkWithSpace(nil)
 //--------------------------------------------------------------------
 {
-	mBaseChunkSize = mTempChunkSize = (nsMemAllocator::kChunkSizeMultiple);
+	mBaseChunkSize = mTempChunkSize = (nsAllocatorManager::kChunkSizeMultiple);
 }
 
 //--------------------------------------------------------------------
@@ -46,6 +48,9 @@ nsHeapChunk* nsFixedSizeAllocator::FindChunkWithSpace(size_t blockSize) const
 {
 	nsFixedSizeHeapChunk*	chunk = (nsFixedSizeHeapChunk *)mFirstChunk;
 
+	if (mChunkWithSpace && mChunkWithSpace->GetFreeList())
+		return mChunkWithSpace;
+	
 	//	Try to find an existing chunk with a free block.
 	while (chunk != nil)
 	{
@@ -69,10 +74,12 @@ void *nsFixedSizeAllocator::AllocatorMakeBlock(size_t blockSize)
 	{
 		chunk = (nsFixedSizeHeapChunk *)AllocateChunk(blockSize);
 		if (!chunk) return nil;
+		
+		mChunkWithSpace = chunk;
 	}
 
 	FixedMemoryBlock*	blockHeader = chunk->FetchFirstFree();
-
+	
 #if DEBUG_HEAP_INTEGRITY
 	blockHeader->SetHeaderTag(kUsedBlockHeaderTag);
 	blockHeader->SetTrailerTag(GetAllocatorBlockSize(), kUsedBlockTrailerTag);
@@ -119,8 +126,14 @@ void nsFixedSizeAllocator::AllocatorFreeBlock(void *freeBlock)
 	// if this chunk is completely empty and it's not the first chunk then free it
 	if ( chunk->IsEmpty() && chunk != mFirstChunk )
 	{
+		if (chunk == mChunkWithSpace)
+			mChunkWithSpace = nil;
 		FreeChunk(chunk);
 	}
+	else
+	{
+		mChunkWithSpace = chunk;			// we know is has some space now
+	}
 }
 
 
@@ -170,13 +183,13 @@ nsHeapChunk *nsFixedSizeAllocator::AllocateChunk(size_t requestedBlockSize)
 //--------------------------------------------------------------------
 {
 	Size	actualChunkSize;
-	Handle	tempMemHandle;
-	Ptr		chunkMemory = DoMacMemoryAllocation(mBaseChunkSize, actualChunkSize, &tempMemHandle);
+	Ptr		chunkMemory = nsAllocatorManager::GetAllocatorManager()->AllocateSubheap(mBaseChunkSize, actualChunkSize);
 	
 	// use placement new to initialize the chunk in the memory block
-	nsHeapChunk		*newHeapChunk = new (chunkMemory) nsFixedSizeHeapChunk(this, actualChunkSize, tempMemHandle);
+	nsHeapChunk		*newHeapChunk = new (chunkMemory) nsFixedSizeHeapChunk(this, actualChunkSize);
 	if (newHeapChunk)
 		AddToChunkList(newHeapChunk);
+		
 	return newHeapChunk;
 }
 
@@ -190,11 +203,7 @@ void nsFixedSizeAllocator::FreeChunk(nsHeapChunk *chunkToFree)
 	nsFixedSizeHeapChunk	*thisChunk = (nsFixedSizeHeapChunk *)chunkToFree;
 	thisChunk->~nsFixedSizeHeapChunk();
 	
-	Handle	tempMemHandle = thisChunk->GetMemHandle();
-	if (tempMemHandle)
-		DisposeHandle(tempMemHandle);
-	else
-		DisposePtr((Ptr)thisChunk);
+	nsAllocatorManager::GetAllocatorManager()->FreeSubheap((Ptr)thisChunk);
 }
 
 
@@ -203,9 +212,8 @@ void nsFixedSizeAllocator::FreeChunk(nsHeapChunk *chunkToFree)
 //--------------------------------------------------------------------
 nsFixedSizeHeapChunk::nsFixedSizeHeapChunk(
 			nsMemAllocator 	*inOwningAllocator,
-			Size 			heapSize,
-			Handle 			tempMemHandle) :
-	nsHeapChunk(inOwningAllocator, heapSize, tempMemHandle)
+			Size 			heapSize) :
+	nsHeapChunk(inOwningAllocator, heapSize)
 //--------------------------------------------------------------------
 {
 	nsFixedSizeAllocator	*allocator = (nsFixedSizeAllocator *)mOwningAllocator;
diff --git a/mozilla/lib/mac/MacMemoryAllocator/src/nsFixedSizeAllocator.h b/mozilla/lib/mac/MacMemoryAllocator/src/nsFixedSizeAllocator.h
index bcaac577c2e..bec487ea3f4 100644
--- a/mozilla/lib/mac/MacMemoryAllocator/src/nsFixedSizeAllocator.h
+++ b/mozilla/lib/mac/MacMemoryAllocator/src/nsFixedSizeAllocator.h
@@ -106,7 +106,7 @@ class nsFixedSizeAllocator : public nsMemAllocator
 	
 	public:
 
-								nsFixedSizeAllocator(THz heapZone, size_t blockSize);
+								nsFixedSizeAllocator(size_t blockSize);
 								~nsFixedSizeAllocator();
 
 		virtual void *			AllocatorMakeBlock(size_t blockSize);
@@ -130,7 +130,9 @@ class nsFixedSizeAllocator : public nsMemAllocator
 		UInt32			mBlockSize;		// upper bound for blocks allocated in this heap
 										// does not include block overhead
 
-
+		nsFixedSizeHeapChunk	*mChunkWithSpace;	// cheap optimization
+		
+		
 #if STATS_MAC_MEMORY
 		UInt32			mChunksAllocated;
 		UInt32			mMaxChunksAllocated;
@@ -156,20 +158,20 @@ class nsFixedSizeHeapChunk : public nsHeapChunk
 {
 	public:
 	
-										nsFixedSizeHeapChunk(nsMemAllocator *inOwningAllocator, Size heapSize, Handle tempMemHandle);
-										~nsFixedSizeHeapChunk();
+									nsFixedSizeHeapChunk(nsMemAllocator *inOwningAllocator, Size heapSize);
+									~nsFixedSizeHeapChunk();
 
 		FixedMemoryBlock*			GetFreeList() const { return mFreeList; }
-		void							SetFreeList(FixedMemoryBlock *nextFree) { mFreeList = nextFree; }
+		void						SetFreeList(FixedMemoryBlock *nextFree) { mFreeList = nextFree; }
 				
 		FixedMemoryBlock*			FetchFirstFree();
-		void							ReturnToFreeList(FixedMemoryBlock *freeBlock);
+		void						ReturnToFreeList(FixedMemoryBlock *freeBlock);
 
 	protected:
 		
 	#if STATS_MAC_MEMORY
-		UInt32							chunkSize;
-		UInt32							numBlocks;
+		UInt32						chunkSize;
+		UInt32						numBlocks;
 	#endif
 		
 		FixedMemoryBlock			*mFreeList;
diff --git a/mozilla/lib/mac/MacMemoryAllocator/src/nsLargeHeapAllocator.cp b/mozilla/lib/mac/MacMemoryAllocator/src/nsLargeHeapAllocator.cp
index 2aa5096f74b..1b5530eca21 100644
--- a/mozilla/lib/mac/MacMemoryAllocator/src/nsLargeHeapAllocator.cp
+++ b/mozilla/lib/mac/MacMemoryAllocator/src/nsLargeHeapAllocator.cp
@@ -19,14 +19,15 @@
 #include <MacMemory.h>
 
 #include "nsMemAllocator.h"
+#include "nsAllocatorManager.h"
 #include "nsLargeHeapAllocator.h"
 
 
  const UInt32 LargeBlockHeader::kLargeBlockOverhead = sizeof(LargeBlockHeader) + MEMORY_BLOCK_TAILER_SIZE;
  
 //--------------------------------------------------------------------
-nsLargeHeapAllocator::nsLargeHeapAllocator(THz heapZone)
-:	nsMemAllocator(heapZone)
+nsLargeHeapAllocator::nsLargeHeapAllocator()
+:	nsMemAllocator()
 //--------------------------------------------------------------------
 {
 	mBaseChunkSize = mTempChunkSize = (64 * 1024);
@@ -160,17 +161,16 @@ nsHeapChunk *nsLargeHeapAllocator::AllocateChunk(size_t requestedBlockSize)
 //--------------------------------------------------------------------
 {
 	Size	chunkSize = mBaseChunkSize, actualChunkSize;
-	Handle	tempMemHandle;
 	
 	size_t	paddedBlockSize = (( requestedBlockSize + 3 ) & ~3) + 3 * LargeBlockHeader::kLargeBlockOverhead + sizeof(nsLargeHeapChunk);
 	
 	if (paddedBlockSize > chunkSize)
 		chunkSize = paddedBlockSize;
 
-	Ptr		chunkMemory = DoMacMemoryAllocation(chunkSize, actualChunkSize, &tempMemHandle);
+	Ptr		chunkMemory = nsAllocatorManager::GetAllocatorManager()->AllocateSubheap(chunkSize, actualChunkSize);
 	
 	// use placement new to initialize the chunk in the memory block
-	nsHeapChunk		*newHeapChunk = new (chunkMemory) nsLargeHeapChunk(this, actualChunkSize, tempMemHandle);
+	nsHeapChunk		*newHeapChunk = new (chunkMemory) nsLargeHeapChunk(this, actualChunkSize);
 	
 	if (newHeapChunk)
 		AddToChunkList(newHeapChunk);
@@ -188,11 +188,7 @@ void nsLargeHeapAllocator::FreeChunk(nsHeapChunk *chunkToFree)
 	nsLargeHeapChunk	*thisChunk = (nsLargeHeapChunk *)chunkToFree;
 	thisChunk->~nsLargeHeapChunk();
 	
-	Handle	tempMemHandle = thisChunk->GetMemHandle();
-	if (tempMemHandle)
-		DisposeHandle(tempMemHandle);
-	else
-		DisposePtr((Ptr)thisChunk);
+	nsAllocatorManager::GetAllocatorManager()->FreeSubheap((Ptr)thisChunk);
 }
 
 
@@ -201,9 +197,8 @@ void nsLargeHeapAllocator::FreeChunk(nsHeapChunk *chunkToFree)
 //--------------------------------------------------------------------
 nsLargeHeapChunk::nsLargeHeapChunk(
 			nsMemAllocator 	*inOwningAllocator,
-			Size 			heapSize,
-			Handle 			tempMemHandle) :
-	nsHeapChunk(inOwningAllocator, heapSize, tempMemHandle)
+			Size 			heapSize) :
+	nsHeapChunk(inOwningAllocator, heapSize)
 //--------------------------------------------------------------------
 {
 	heapSize -= sizeof(nsLargeHeapChunk);		// subtract heap overhead
diff --git a/mozilla/lib/mac/MacMemoryAllocator/src/nsLargeHeapAllocator.h b/mozilla/lib/mac/MacMemoryAllocator/src/nsLargeHeapAllocator.h
index 15f95b8f8cf..27a8652fb8f 100644
--- a/mozilla/lib/mac/MacMemoryAllocator/src/nsLargeHeapAllocator.h
+++ b/mozilla/lib/mac/MacMemoryAllocator/src/nsLargeHeapAllocator.h
@@ -108,7 +108,7 @@ class nsLargeHeapAllocator : public nsMemAllocator
 	
 	
 	public:
-								nsLargeHeapAllocator(THz heapZone);
+								nsLargeHeapAllocator();
 								~nsLargeHeapAllocator();
 
 
@@ -136,8 +136,7 @@ class nsLargeHeapChunk : public nsHeapChunk
 	public:
 	
 							nsLargeHeapChunk(	nsMemAllocator *inOwningAllocator,
-												Size 			heapSize,
-												Handle 			tempMemHandle);
+												Size 			heapSize);
 							~nsLargeHeapChunk();
 
 		LargeBlockHeader*	GetHeadBlock()		{ return mHead;	}
diff --git a/mozilla/lib/mac/MacMemoryAllocator/src/nsMemAllocator.cp b/mozilla/lib/mac/MacMemoryAllocator/src/nsMemAllocator.cp
index 6b566e039ef..19c7a29e312 100644
--- a/mozilla/lib/mac/MacMemoryAllocator/src/nsMemAllocator.cp
+++ b/mozilla/lib/mac/MacMemoryAllocator/src/nsMemAllocator.cp
@@ -15,18 +15,19 @@
  * Copyright (C) 1998 Netscape Communications Corporation. All Rights    
  * Reserved. */
 
+#include <stdio.h>
 #include <MacMemory.h>
 
-
 #include "nsMemAllocator.h"
+#include "nsAllocatorManager.h"
+
 
 //--------------------------------------------------------------------
-nsHeapChunk::nsHeapChunk(nsMemAllocator *inOwningAllocator, Size heapSize, Handle tempMemHandle)
+nsHeapChunk::nsHeapChunk(nsMemAllocator *inOwningAllocator, Size heapSize)
 :	mOwningAllocator(inOwningAllocator)
 ,	mNextChunk(nil)
 ,	mHeapSize(heapSize)
 ,	mUsedBlocks(0)
-,	mTempMemHandle(tempMemHandle)
 #if DEBUG_HEAP_INTEGRITY	
 ,	mSignature(kChunkSignature)
 #endif
@@ -46,13 +47,22 @@ nsHeapChunk::~nsHeapChunk()
 #pragma mark -
 
 //--------------------------------------------------------------------
-nsMemAllocator::nsMemAllocator(THz inHeapZone)
-:	mHeapZone(inHeapZone)
-,	mFirstChunk(nil)
+nsMemAllocator::nsMemAllocator()
+:	mFirstChunk(nil)
 ,	mLastChunk(nil)
 #if DEBUG_HEAP_INTEGRITY	
 ,	mSignature(kMemAllocatorSignature)
 #endif
+#if STATS_MAC_MEMORY
+,	mCurBlockCount(0)
+,	mMaxBlockCount(0)
+,	mCurBlockSpaceUsed(0)
+,	mMaxBlockSpaceUsed(0)
+,	mCurHeapSpaceUsed(0)
+,	mMaxHeapSpaceUsed(0)
+,	mCurSubheapCount(0)
+,	mMaxSubheapCount(0)
+#endif
 //--------------------------------------------------------------------
 {
 }
@@ -109,6 +119,10 @@ void nsMemAllocator::AddToChunkList(nsHeapChunk *inNewChunk)
 	mCurSubheapCount ++;
 	if (mCurSubheapCount > mMaxSubheapCount)
 		mMaxSubheapCount = mCurSubheapCount;
+		
+	mCurHeapSpaceUsed += inNewChunk->GetChunkSize();
+	if (mCurHeapSpaceUsed > mMaxHeapSpaceUsed)
+		mMaxHeapSpaceUsed = mCurHeapSpaceUsed;
 #endif
 }
 
@@ -146,67 +160,13 @@ void nsMemAllocator::RemoveFromChunkList(nsHeapChunk *inChunk)
 	
 #if STATS_MAC_MEMORY
 	mCurSubheapCount --;
+	
+	mCurHeapSpaceUsed -= inChunk->GetChunkSize();
 #endif
 }
 
 
-// amount of free space to maintain in the heap. This is used by 
-// plugins, GWorlds and other things.
-const Size nsMemAllocator::kFreeHeapSpace 		= 512 * 1024;
-
-// block size multiple. All blocks should be multiples of this size,
-// to reduce heap fragmentation
-const Size nsMemAllocator::kChunkSizeMultiple 	= 2 * 1024;
-const Size nsMemAllocator::kMacMemoryPtrOvehead	= 16;
-
-//--------------------------------------------------------------------
-Ptr nsMemAllocator::DoMacMemoryAllocation(Size preferredSize, Size &outActualSize,
-			Handle *outTempMemHandle)
-// This is the routine that does the actual memory allocation.
-// Possible results:
-//		1.	Allocate pointer in heap. Return ptr, *outTempMemHandle==nil.
-//		2.	Allocate handle in temp mem. Return *handle, and put handle in *outTempMemHandle
-//		3.	Fail to allocate. Return nil,  *outTempMemHandle==nil.
-//
-//		outActualSize may be larger than preferredSize because we
-//		want to avoid heap fragmentation by keeping all blocks multiples
-//		of one smallest block size. outActualSize will not be smaller
-//		than preferredSize
-//--------------------------------------------------------------------
-{
-	*outTempMemHandle = nil;
-	
-	// calculate an ideal chunk size by rounding up
-	preferredSize = kChunkSizeMultiple * ((preferredSize + (kChunkSizeMultiple - 1)) / kChunkSizeMultiple);
-	
-	// take into accound the memory manager's pointer overhead (16 btyes), to avoid fragmentation
-	preferredSize += ((preferredSize / kChunkSizeMultiple) - 1) * kMacMemoryPtrOvehead;
-	outActualSize = preferredSize;
-	
-	// try to allocate in our heap zone
-	::SetZone(mHeapZone);
-
-	Ptr	resultPtr = ::NewPtr(preferredSize);
-
-	// set the current zone back to the application zone
-	::SetZone(::ApplicationZone());
-
-	if (resultPtr != nil)
-		return resultPtr;
-	
-	// that failed, so try temp mem now
-	OSErr		err;
-	Handle		tempMemHandle = ::TempNewHandle(preferredSize, &err);
-	if (tempMemHandle != nil)
-	{
-		HLock(tempMemHandle);		// may thee remain locked for all time
-		*outTempMemHandle = tempMemHandle;
-		return *tempMemHandle;
-	}
-
-	return nil;			// failure
-}
-
+#pragma mark -
 
 #if STATS_MAC_MEMORY
 
@@ -246,4 +206,31 @@ void nsMemAllocator::AccountForFreedBlock(size_t logicalSize)
 	mCurBlockSpaceUsed -= logicalSize;
 }
 
+
+//--------------------------------------------------------------------
+void nsMemAllocator::DumpMemoryStats(PRFileDesc *outFile)
+//--------------------------------------------------------------------
+{
+	char			outString[ 1024 ];
+	
+	WriteString ( outFile, "\n\n--------------------------------------------------------------------------------\n" );
+	WriteString(outFile, "Stats for heap\n");
+	WriteString ( outFile, "--------------------------------------------------------------------------------\n" );
+	WriteString ( outFile, "                     Current         Max\n" );
+	WriteString ( outFile, "                  ----------     -------\n" );
+	sprintf( outString,    "Num chunks:       %10d  %10d\n", mCurSubheapCount, mMaxSubheapCount);
+	WriteString ( outFile, outString );
+	sprintf( outString,    "Chunk total:      %10d  %10d\n", mCurHeapSpaceUsed, mMaxHeapSpaceUsed);
+	WriteString ( outFile, outString );
+	sprintf( outString,    "Block space:      %10d  %10d\n", mCurBlockSpaceUsed, mMaxBlockSpaceUsed );
+	WriteString ( outFile, outString );
+	sprintf( outString,    "Blocks used:      %10d  %10d\n", mCurBlockCount, mMaxBlockCount );
+	WriteString ( outFile, outString );
+	WriteString ( outFile, "                                 -------\n" );
+	sprintf( outString,    "%s of allocated space used:    %10.2f\n", "%", 100.0 * mMaxBlockSpaceUsed / mMaxHeapSpaceUsed );
+	WriteString ( outFile, outString );
+
+	WriteString ( outFile, "\n\n");
+}
+
 #endif
diff --git a/mozilla/lib/mac/MacMemoryAllocator/src/nsMemAllocator.h b/mozilla/lib/mac/MacMemoryAllocator/src/nsMemAllocator.h
index 256305793dd..c8b783c070b 100644
--- a/mozilla/lib/mac/MacMemoryAllocator/src/nsMemAllocator.h
+++ b/mozilla/lib/mac/MacMemoryAllocator/src/nsMemAllocator.h
@@ -18,6 +18,10 @@
 
 #include <stddef.h>
 
+#if STATS_MAC_MEMORY
+#include "prio.h"
+#endif
+
 class nsMemAllocator;
 class nsHeapChunk;
 
@@ -86,7 +90,7 @@ class nsHeapChunk
 {
 	public:
 		
-								nsHeapChunk(nsMemAllocator *inOwningAllocator, Size heapSize, Handle tempMemHandle);
+								nsHeapChunk(nsMemAllocator *inOwningAllocator, Size heapSize);
 								~nsHeapChunk();
 		
 		nsHeapChunk*			GetNextChunk() const	{ return mNextChunk; }
@@ -99,8 +103,8 @@ class nsHeapChunk
 		
 		Boolean					IsEmpty() const			{ return mUsedBlocks == 0;	}
 		
-		Handle					GetMemHandle()			{ return mTempMemHandle;	}
-
+		UInt32					GetChunkSize()			{ return mHeapSize;	}
+		
 #if DEBUG_HEAP_INTEGRITY	
 		Boolean					IsGoodChunk()			{ return mSignature == kChunkSignature; }
 #endif
@@ -117,9 +121,6 @@ class nsHeapChunk
 		nsHeapChunk				*mNextChunk;
 		UInt32					mUsedBlocks;
 		UInt32					mHeapSize;		
-	
-	private:
-		Handle					mTempMemHandle;			// if nil, this chunk is a pointer in the heap
 };
 
 
@@ -130,7 +131,7 @@ class nsMemAllocator
 {
 	public:
 
-								nsMemAllocator(THz inHeapZone);
+								nsMemAllocator();
 		virtual 				~nsMemAllocator() = 0;
 		
 		static size_t			GetBlockSize(void *thisBlock);
@@ -155,13 +156,7 @@ class nsMemAllocator
 #endif
 
 	protected:
-		
-		static const Size		kFreeHeapSpace;
-		static const Size		kChunkSizeMultiple;
-		static const Size		kMacMemoryPtrOvehead;
-		
-		Ptr						DoMacMemoryAllocation(Size preferredSize, Size &outActualSize, Handle *outTempMemHandle);
-	
+				
 		void					AddToChunkList(nsHeapChunk *inNewChunk);
 		void					RemoveFromChunkList(nsHeapChunk *inChunk);
 		
@@ -178,8 +173,6 @@ class nsMemAllocator
 
 		UInt32					mBaseChunkSize;			// size of subheap allocated at startup
 		UInt32					mTempChunkSize;			// size of additional subheaps
-		
-		THz						mHeapZone;				// heap zone in which to allocate pointers
 
 #if STATS_MAC_MEMORY
 		
@@ -189,6 +182,8 @@ class nsMemAllocator
 		void					AccountForFreedBlock(size_t logicalSize);
 		void					AccountForResizedBlock(size_t oldLogicalSize, size_t newLogicalSize);
 		
+		void					DumpMemoryStats(PRFileDesc *statsFile);
+		
 	private:
 	
 		UInt32					mCurBlockCount;			// number of malloc blocks allocated now
diff --git a/mozilla/lib/mac/MacMemoryAllocator/src/nsSmallHeapAllocator.cp b/mozilla/lib/mac/MacMemoryAllocator/src/nsSmallHeapAllocator.cp
index a31aa9eb457..3e277832147 100644
--- a/mozilla/lib/mac/MacMemoryAllocator/src/nsSmallHeapAllocator.cp
+++ b/mozilla/lib/mac/MacMemoryAllocator/src/nsSmallHeapAllocator.cp
@@ -20,17 +20,18 @@
 #include <MacMemory.h>
 
 #include "nsMemAllocator.h"
+#include "nsAllocatorManager.h"
 #include "nsSmallHeapAllocator.h"
 
 const UInt32 SmallHeapBlock::kBlockOverhead = sizeof(SmallHeapBlock) + MEMORY_BLOCK_TAILER_SIZE;
 
 
 //--------------------------------------------------------------------
-nsSmallHeapAllocator::nsSmallHeapAllocator(THz heapZone)
-:	nsMemAllocator(heapZone)
+nsSmallHeapAllocator::nsSmallHeapAllocator()
+:	nsMemAllocator()
 //--------------------------------------------------------------------
 {
-	mBaseChunkSize = mTempChunkSize = (nsMemAllocator::kChunkSizeMultiple);
+	mBaseChunkSize = mTempChunkSize = (nsAllocatorManager::kChunkSizeMultiple);
 }
 
 //--------------------------------------------------------------------
@@ -146,12 +147,10 @@ nsHeapChunk *nsSmallHeapAllocator::AllocateChunk(size_t blockSize)
 		minChunkSize = mBaseChunkSize;
 		
 	Size	actualChunkSize;
-	Handle	tempMemHandle;
-	Ptr		chunkMemory = DoMacMemoryAllocation(minChunkSize, actualChunkSize, &tempMemHandle);
+	Ptr		chunkMemory = nsAllocatorManager::GetAllocatorManager()->AllocateSubheap(mBaseChunkSize, actualChunkSize);
 	
 	// use placement new to initialize the chunk in the memory block
-	nsHeapChunk		*newHeapChunk = new (chunkMemory) nsSmallHeapChunk(this, actualChunkSize, tempMemHandle);
-	
+	nsHeapChunk		*newHeapChunk = new (chunkMemory) nsSmallHeapChunk(this, actualChunkSize);
 	if (newHeapChunk)
 		AddToChunkList(newHeapChunk);
 	
@@ -168,11 +167,7 @@ void nsSmallHeapAllocator::FreeChunk(nsHeapChunk *chunkToFree)
 	nsSmallHeapChunk	*thisChunk = (nsSmallHeapChunk *)chunkToFree;
 	thisChunk->~nsSmallHeapChunk();
 	
-	Handle	tempMemHandle = thisChunk->GetMemHandle();
-	if (tempMemHandle)
-		DisposeHandle(tempMemHandle);
-	else
-		DisposePtr((Ptr)thisChunk);
+	nsAllocatorManager::GetAllocatorManager()->FreeSubheap((Ptr)thisChunk);
 }
 
 
@@ -181,9 +176,8 @@ void nsSmallHeapAllocator::FreeChunk(nsHeapChunk *chunkToFree)
 //--------------------------------------------------------------------
 nsSmallHeapChunk::nsSmallHeapChunk(
 			nsMemAllocator 	*inOwningAllocator,
-			Size 			heapSize,
-			Handle 			tempMemHandle) :
-	nsHeapChunk(inOwningAllocator, heapSize, tempMemHandle),
+			Size 			heapSize) :
+	nsHeapChunk(inOwningAllocator, heapSize),
 	mOverflow(nil)
 //--------------------------------------------------------------------
 {
@@ -298,8 +292,6 @@ void *nsSmallHeapChunk::GetSpaceForBlock(size_t blockSize)
 			//	room for another allocation out of the 
 			//	block, then split the block up.
 			
-			//blockToCarve->SetUnusedBlockSize(roundedBlockSize);
-			//leftovers = blockToCarveSize - blockToCarve->GetBlockHeapUsage();
 			SInt32	leftovers = blockToCarveSize - roundedBlockSize - SmallHeapBlock::kBlockOverhead;
 
 			if (leftovers >= kDefaultSmallHeadMinSize)
diff --git a/mozilla/lib/mac/MacMemoryAllocator/src/nsSmallHeapAllocator.h b/mozilla/lib/mac/MacMemoryAllocator/src/nsSmallHeapAllocator.h
index afc3d794f93..ca9c60b28b4 100644
--- a/mozilla/lib/mac/MacMemoryAllocator/src/nsSmallHeapAllocator.h
+++ b/mozilla/lib/mac/MacMemoryAllocator/src/nsSmallHeapAllocator.h
@@ -130,7 +130,7 @@ class nsSmallHeapAllocator : public nsMemAllocator
 
 	public:
 			
-								nsSmallHeapAllocator(THz heapZone);
+								nsSmallHeapAllocator();
 								~nsSmallHeapAllocator();
 
 		virtual void *			AllocatorMakeBlock(size_t blockSize);
@@ -153,9 +153,7 @@ class nsSmallHeapChunk : public nsHeapChunk
 {
 	public:
 		
-								nsSmallHeapChunk(	nsMemAllocator *inOwningAllocator,
-													Size 			heapSize,
-													Handle 			tempMemHandle);
+								nsSmallHeapChunk(nsMemAllocator *inOwningAllocator, Size heapSize);
 								~nsSmallHeapChunk();
 		
 		void *					GetSpaceForBlock(UInt32 roundedBlockSize);