diff --git a/src/Mod/Path/App/Area.cpp b/src/Mod/Path/App/Area.cpp
index 77e1884160..1899898099 100644
--- a/src/Mod/Path/App/Area.cpp
+++ b/src/Mod/Path/App/Area.cpp
@@ -210,7 +210,7 @@ Area::Area(const Area& other, bool deep_copy)
     myShape = other.myShape;
     myShapeDone = other.myShapeDone;
     mySections.reserve(other.mySections.size());
-    for (shared_ptr<Area> area : other.mySections)
+    for (const shared_ptr<Area>& area : other.mySections)
         mySections.push_back(make_shared<Area>(*area, true));
 }
 
diff --git a/src/Mod/Path/libarea/Adaptive.cpp b/src/Mod/Path/libarea/Adaptive.cpp
index b46284572f..070b9cd3de 100644
--- a/src/Mod/Path/libarea/Adaptive.cpp
+++ b/src/Mod/Path/libarea/Adaptive.cpp
@@ -1794,7 +1794,7 @@ std::list<AdaptiveOutput> Adaptive2d::Execute(const DPaths &stockPaths, const DP
 		if (opType == OperationType::otClearingOutside)
 		{
 			// add stock paths, with overshooting
-			for (auto p : stockOvershoot)
+			for (const auto& p : stockOvershoot)
 				inputPaths.push_back(p);
 		}
 		else if (opType == OperationType::otClearingInside)
@@ -2639,7 +2639,7 @@ void Adaptive2d::ProcessPolyNode(Paths boundPaths, Paths toolBoundPaths)
 		clipof.Execute(outsideEngage, toolRadiusScaled - stepOverFactor * toolRadiusScaled);
 		CleanPolygons(outsideEngage);
 		ReversePaths(outsideEngage);
-		for (auto p : outsideEngage)
+		for (const auto& p : outsideEngage)
 			engageBounds.push_back(p);
 		outsideEntry = true;
 	}
diff --git a/src/Mod/Path/libarea/AreaOrderer.cpp b/src/Mod/Path/libarea/AreaOrderer.cpp
index 46ac425606..8d1d47e6e7 100644
--- a/src/Mod/Path/libarea/AreaOrderer.cpp
+++ b/src/Mod/Path/libarea/AreaOrderer.cpp
@@ -77,14 +77,14 @@ void CInnerCurves::Insert(shared_ptr<CCurve> pcurve)
 	shared_ptr<CInnerCurves> new_item(new CInnerCurves(shared_from_this(), pcurve));
 	this->m_inner_curves.insert(new_item);
 
-    for(shared_ptr<CInnerCurves> c : outside_of_these) {
+    for(const shared_ptr<CInnerCurves>& c : outside_of_these) {
 		// move items
 		c->m_pOuter = new_item;
 		new_item->m_inner_curves.insert(c);
 		this->m_inner_curves.erase(c);
 	}
 
-    for(shared_ptr<CInnerCurves> c : crossing_these) {
+    for(const shared_ptr<CInnerCurves>& c : crossing_these) {
 		// unite these
 		new_item->Unite(c);
 		this->m_inner_curves.erase(c);