diff --git a/indra/newview/llfilteredwearablelist.cpp b/indra/newview/llfilteredwearablelist.cpp
index f2af9b530061f1febd67dbbc28898b6f399a29f8..e67a6a2b77a1f8c1cfaa570744ea7f2345bcebf2 100644
--- a/indra/newview/llfilteredwearablelist.cpp
+++ b/indra/newview/llfilteredwearablelist.cpp
@@ -37,6 +37,7 @@
 LLFilteredWearableListManager::LLFilteredWearableListManager(LLInventoryItemsList* list, LLInventoryCollectFunctor* collector)
 : mWearableList(list)
 , mCollector(collector)
+, mListStale(true)
 {
 	llassert(mWearableList);
 	gInventory.addObserver(this);
@@ -64,7 +65,16 @@ void LLFilteredWearableListManager::changed(U32 mask)
 		return;
 	}
 
-	populateList();
+	if (mWearableList->isInVisibleChain() || mWearableList->getForceRefresh())
+	{
+		// Todo: current populateList() is time consuming and changed() is time-sensitive,
+		// either move from here or optimize
+		populateList();
+	}
+	else
+	{
+		mListStale = true;
+	}
 }
 
 void LLFilteredWearableListManager::setFilterCollector(LLInventoryCollectFunctor* collector)
@@ -73,13 +83,31 @@ void LLFilteredWearableListManager::setFilterCollector(LLInventoryCollectFunctor
 	populateList();
 }
 
+void LLFilteredWearableListManager::populateIfNeeded()
+{
+	if (mListStale)
+	{
+		populateList();
+	}
+}
+
+LLTrace::BlockTimerStatHandle FTM_MANAGER_LIST_POPULATION("Manager List Population");
+
 void LLFilteredWearableListManager::populateList()
 {
+	LL_RECORD_BLOCK_TIME(FTM_MANAGER_LIST_POPULATION);
+
 	LLInventoryModel::cat_array_t cat_array;
 	LLInventoryModel::item_array_t item_array;
 
 	if(mCollector)
 	{
+		// Too slow with large inventory!
+		// Consider refactoring into "request once, append ids on changed()", since
+		// Inventory observer provides ids of changed items this should be possible,
+		// but will likely require modifying LLInventoryItemsList to avoid code-repeats.
+		// Or make something like "gather everything and filter manually on idle"
+		mListStale = false;
 		gInventory.collectDescendentsIf(
 				gInventory.getRootFolderID(),
 				cat_array,
diff --git a/indra/newview/llfilteredwearablelist.h b/indra/newview/llfilteredwearablelist.h
index f44ab1466f486422709d4239a5e1cdcae74eb8a9..197302f41dc4e925bb0bf6e21615b8afc4b36ed3 100644
--- a/indra/newview/llfilteredwearablelist.h
+++ b/indra/newview/llfilteredwearablelist.h
@@ -52,9 +52,9 @@ class LLFilteredWearableListManager : public LLInventoryObserver
 	void setFilterCollector(LLInventoryCollectFunctor* collector);
 
 	/**
-	 * Populates wearable list with filtered data.
-	 */
-	void populateList();
+	* Populates wearable list with filtered data in case there were any updates.
+	*/
+	void populateIfNeeded();
 
 	/**
 	 * Drop operation
@@ -62,8 +62,14 @@ class LLFilteredWearableListManager : public LLInventoryObserver
 	void holdProgress();
 
 private:
+	/**
+	* Populates wearable list with filtered data.
+	*/
+	void populateList();
+
 	LLInventoryItemsList* mWearableList;
 	LLInventoryCollectFunctor* mCollector;
+	bool mListStale;
 };
 
 #endif //LL_LLFILTEREDWEARABLELIST_H
diff --git a/indra/newview/llinventoryitemslist.h b/indra/newview/llinventoryitemslist.h
index fe05c2ed7c25ac0211a9d80009bbfba90e82adef..ce41105f989f28d3117ceb792e0f0f60848a8ad9 100644
--- a/indra/newview/llinventoryitemslist.h
+++ b/indra/newview/llinventoryitemslist.h
@@ -61,6 +61,11 @@ class LLInventoryItemsList : public LLFlatListViewEx
 	 */
 	void setForceRefresh(bool force_refresh){ mForceRefresh = force_refresh; }
 
+	/**
+	* If refreshes when invisible.
+	*/
+	bool getForceRefresh(){ return mForceRefresh;  }
+
 	virtual bool selectItemByValue(const LLSD& value, bool select = true);
 
 	void updateSelection();
diff --git a/indra/newview/llpaneloutfitedit.cpp b/indra/newview/llpaneloutfitedit.cpp
index 208ee77f2d69899b4f3af2e800dd9e37725fc362..3f6bdde127683ce7a521aefbffb43f81e3d0addb 100644
--- a/indra/newview/llpaneloutfitedit.cpp
+++ b/indra/newview/llpaneloutfitedit.cpp
@@ -578,7 +578,6 @@ void LLPanelOutfitEdit::onOpen(const LLSD& key)
 		// *TODO: this method is called even panel is not visible to user because its parent layout panel is hidden.
 		// So, we can defer initializing a bit.
 		mWearableListManager = new LLFilteredWearableListManager(mWearableItemsList, mListViewItemTypes[LVIT_ALL]->collector);
-		mWearableListManager->populateList();
 		displayCurrentOutfit();
 		mInitialized = true;
 	}
@@ -632,6 +631,10 @@ void LLPanelOutfitEdit::showAddWearablesPanel(bool show_add_wearables)
 		// Reset mWearableItemsList position to top. See EXT-8180.
 		mWearableItemsList->goToTop();
 	}
+	else
+	{
+		mWearableListManager->populateIfNeeded();
+	}
 
 	//switching button bars
 	getChildView("no_add_wearables_button_bar")->setVisible( !show_add_wearables);
@@ -661,6 +664,7 @@ void LLPanelOutfitEdit::showWearablesListView()
 	{
 		updateWearablesPanelVerbButtons();
 		updateFiltersVisibility();
+		mWearableListManager->populateIfNeeded();
 	}
 	mListViewBtn->setToggleState(TRUE);
 }