diff --git a/indra/llcommon/llfasttimer_class.cpp b/indra/llcommon/llfasttimer_class.cpp
index bd594b06cfd5094cd28aa3b1ec56ee59f755a954..675eda2fc580a19be813e0f09c69d492f12ab14e 100644
--- a/indra/llcommon/llfasttimer_class.cpp
+++ b/indra/llcommon/llfasttimer_class.cpp
@@ -228,6 +228,14 @@ void LLFastTimer::DeclareTimer::updateCachedPointers()
 		// update cached pointer
 		it->mFrameState = &it->mTimer.getFrameState();
 	}
+
+	// also update frame states of timers on stack
+	LLFastTimer* cur_timerp = LLFastTimer::sCurTimerData.mCurTimer;
+	while(cur_timerp->mLastTimerData.mCurTimer != cur_timerp)	
+	{
+		cur_timerp->mFrameState = &cur_timerp->mFrameState->mTimer->getFrameState();
+		cur_timerp = cur_timerp->mLastTimerData.mCurTimer;
+	}
 }
 
 //static
diff --git a/indra/newview/llappviewer.cpp b/indra/newview/llappviewer.cpp
index 80ac385e3b6a9931b7d579d9f71b4bddac5137d6..1fef8d005a232faaadf747807bf0f718ef22fb82 100644
--- a/indra/newview/llappviewer.cpp
+++ b/indra/newview/llappviewer.cpp
@@ -4015,6 +4015,8 @@ class LLFrameStatsTimer : public LLFrameTimer
 
 static LLFastTimer::DeclareTimer FTM_AUDIO_UPDATE("Update Audio");
 static LLFastTimer::DeclareTimer FTM_CLEANUP("Cleanup");
+static LLFastTimer::DeclareTimer FTM_CLEANUP_DRAWABLES("Drawables");
+static LLFastTimer::DeclareTimer FTM_CLEANUP_OBJECTS("Objects");
 static LLFastTimer::DeclareTimer FTM_IDLE_CB("Idle Callbacks");
 static LLFastTimer::DeclareTimer FTM_LOD_UPDATE("Update LOD");
 static LLFastTimer::DeclareTimer FTM_OBJECTLIST_UPDATE("Update Objectlist");
@@ -4291,8 +4293,14 @@ void LLAppViewer::idle()
 
 	{
 		LLFastTimer t(FTM_CLEANUP);
-		gObjectList.cleanDeadObjects();
-		LLDrawable::cleanupDeadDrawables();
+		{
+			LLFastTimer t(FTM_CLEANUP_OBJECTS);
+			gObjectList.cleanDeadObjects();
+		}
+		{
+			LLFastTimer t(FTM_CLEANUP_DRAWABLES);
+			LLDrawable::cleanupDeadDrawables();
+		}
 	}
 	
 	//
diff --git a/indra/newview/llviewerobjectlist.cpp b/indra/newview/llviewerobjectlist.cpp
index 9f882ee73276baadc9bba275194bb7089b5409cc..48ccc7d0354d078f902ddfcdd05f7be19f3fd230 100644
--- a/indra/newview/llviewerobjectlist.cpp
+++ b/indra/newview/llviewerobjectlist.cpp
@@ -1339,18 +1339,29 @@ void LLViewerObjectList::cleanDeadObjects(BOOL use_timer)
 
 	S32 num_removed = 0;
 	LLViewerObject *objectp;
-	for (vobj_list_t::iterator iter = mObjects.begin(); iter != mObjects.end(); )
+	
+	vobj_list_t::reverse_iterator target = mObjects.rbegin();
+
+	vobj_list_t::iterator iter = mObjects.begin();
+	for ( ; iter != mObjects.end(); )
 	{
-		// Scan for all of the dead objects and remove any "global" references to them.
+		// Scan for all of the dead objects and put them all on the end of the list with no ref count ops
 		objectp = *iter;
+		if (objectp == NULL)
+		{ //we caught up to the dead tail
+			break;
+		}
+
 		if (objectp->isDead())
 		{
-			iter = mObjects.erase(iter);
+			LLPointer<LLViewerObject>::swap(*iter, *target);
+			*target = NULL;
+			++target;
 			num_removed++;
 
-			if (num_removed == mNumDeadObjects)
+			if (num_removed == mNumDeadObjects || iter->isNull())
 			{
-				// We've cleaned up all of the dead objects.
+				// We've cleaned up all of the dead objects or caught up to the dead tail
 				break;
 			}
 		}
@@ -1360,6 +1371,11 @@ void LLViewerObjectList::cleanDeadObjects(BOOL use_timer)
 		}
 	}
 
+	llassert(num_removed == mNumDeadObjects);
+
+	//erase as a block
+	mObjects.erase(mObjects.begin()+(mObjects.size()-mNumDeadObjects), mObjects.end());
+
 	// We've cleaned the global object list, now let's do some paranoia testing on objects
 	// before blowing away the dead list.
 	mDeadObjects.clear();
diff --git a/indra/newview/llvoicevivox.cpp b/indra/newview/llvoicevivox.cpp
index 9dc6b5194ec4420e88ba16ca6504caf9229e2e4e..0db0010688369ee1f21417d407b42888b99148c1 100644
--- a/indra/newview/llvoicevivox.cpp
+++ b/indra/newview/llvoicevivox.cpp
@@ -7049,7 +7049,7 @@ LLVivoxProtocolParser::~LLVivoxProtocolParser()
 		XML_ParserFree(parser);
 }
 
-//static LLFastTimer::DeclareTimer FTM_VIVOX_PROCESS("Vivox Process");
+static LLFastTimer::DeclareTimer FTM_VIVOX_PROCESS("Vivox Process");
 
 // virtual
 LLIOPipe::EStatus LLVivoxProtocolParser::process_impl(
@@ -7059,7 +7059,7 @@ LLIOPipe::EStatus LLVivoxProtocolParser::process_impl(
 													  LLSD& context,
 													  LLPumpIO* pump)
 {
-	//LLFastTimer t(FTM_VIVOX_PROCESS);
+	LLFastTimer t(FTM_VIVOX_PROCESS);
 	LLBufferStream istr(channels, buffer.get());
 	std::ostringstream ostr;
 	while (istr.good())