diff --git a/src/Mod/Sketcher/App/SketchObject.cpp b/src/Mod/Sketcher/App/SketchObject.cpp
index 05f1f399eb..37e81f3b13 100644
--- a/src/Mod/Sketcher/App/SketchObject.cpp
+++ b/src/Mod/Sketcher/App/SketchObject.cpp
@@ -1162,8 +1162,7 @@ int SketchObject::setConstruction(int GeoId, bool on)
     // in the accumulative of actions it is judged that it is worth to trigger an update here.
 
     std::unique_ptr<Part::Geometry> geo(vals[GeoId]->clone());
-    auto gft = GeometryFacade::getFacade(geo.get());
-    gft->setConstruction(!gft->getConstruction());
+    GeometryFacade::setConstruction(geo.get(), on);
     this->Geometry.set1Value(GeoId, std::move(geo));
 
     solverNeedsUpdate=true;
@@ -5693,6 +5692,9 @@ int SketchObject::carbonCopy(App::DocumentObject * pObj, bool construction)
 
     const std::vector< Sketcher::Constraint * > &scvals = psObj->Constraints.getValues();
 
+    newVals.reserve(vals.size()+svals.size());
+    newcVals.reserve(cvals.size()+scvals.size());
+
     if(psObj->ExternalGeometry.getSize()>0) {
         std::vector<DocumentObject*> Objects     = ExternalGeometry.getValues();
         std::vector<std::string>     SubElements = ExternalGeometry.getSubValues();