diff --git a/CMakeLists.txt b/CMakeLists.txt
new file mode 100755
index 0000000..e83555e
--- /dev/null
+++ b/CMakeLists.txt
@@ -0,0 +1,24 @@
+cmake_minimum_required(VERSION 2.8.9)
+
+project(osgTestBed)
+# automatically add CMAKE_CURRENT_SOURCE_DIR and CMAKE_CURRENT_BINARY_DIR to the include directories in every directory
+SET(CMAKE_INCLUDE_CURRENT_DIR yes)
+
+
+find_package(OpenSceneGraph REQUIRED)
+
+subdirs(
+stressVAOpolicy
+)
+ 
+SET(RUNTIME_OUTPUT_DIRECTORY ${CMAKE_HOME_DIRECTORY}/bin)
+SET(MODULE_OUTPUT_PATH ${CMAKE_HOME_DIRECTORY}/bin)
+SET(RUNTIME_OUTPUT_DIRECTORY ${CMAKE_HOME_DIRECTORY}/lib)
+SET(LIBRARY_OUTPUT_PATH ${CMAKE_HOME_DIRECTORY}/lib)
+
+SET(EXECUTABLE_OUTPUT_PATH_DEBUG ${CMAKE_HOME_DIRECTORY}/ar ) 
+SET(CMAKE_RUNTIME_OUTPUT_DIRECTORY_DEBUG ${CMAKE_HOME_DIRECTORY}/bin)
+SET(CMAKE_RUNTIME_OUTPUT_DIRECTORY_RELEASE ${CMAKE_HOME_DIRECTORY}/bin)
+SET(CMAKE_RUNTIME_OUTPUT_DIRECTORY  ${CMAKE_HOME_DIRECTORY}/lib)
+
+SET(CMAKE_DEBUG_POSTFIX "d")
diff --git a/stressVAOpolicy/CMakeLists.txt b/stressVAOpolicy/CMakeLists.txt
new file mode 100644
index 0000000..f485fce
--- /dev/null
+++ b/stressVAOpolicy/CMakeLists.txt
@@ -0,0 +1,29 @@
+PROJECT(stressVAOpolicy)
+ 
+set(DYNAMIC_OPENSCENEGRAPH True)
+if(DYNAMIC_OPENSCENEGRAPH)
+    add_definitions(-DOSG_DYNAMIC_LIBRARY)
+else()
+    add_definitions(-DOSG_LIBRARY_STATIC)
+endif()
+
+find_package(OpenSceneGraph 3.6.0 REQUIRED
+    osg
+    osgDB
+    osgGA
+    osgUtil
+    osgViewer
+    osgText
+)
+
+INCLUDE_directories(${OSG_INCLUDE_DIR})
+SET(PROJECT_SOURCES
+    stressVAOpolicy.cpp
+)
+
+ADD_EXECUTABLE(stressVAOpolicy ${PROJECT_SOURCES} )
+
+TARGET_LINK_LIBRARIES(stressVAOpolicy  ${OPENTHREADS_LIBRARIES}  ${OPENSCENEGRAPH_LIBRARIES}  )
+
+SET_TARGET_PROPERTIES(stressVAOpolicy PROPERTIES PROJECT_LABEL "BenchTest stressVAOpolicy" DEBUG_POSTFIX ${CMAKE_DEBUG_POSTFIX})
+
diff --git a/stressVAOpolicy/stressVAOpolicy.cpp b/stressVAOpolicy/stressVAOpolicy.cpp
new file mode 100644
index 0000000..e213aae
--- /dev/null
+++ b/stressVAOpolicy/stressVAOpolicy.cpp
@@ -0,0 +1,91 @@
+
+/// This program test robustness of VAS path
+/// it collects geometries given in arg then add and remove them at runtime
+/// stressing osg vas policy as well as driver vao policy
+
+#include <osgUtil/MeshOptimizers>
+#include <osgGA/TrackballManipulator>
+#include <osgGA/FirstPersonManipulator>
+
+#include <osgViewer/Viewer>
+#include <osgViewer/ViewerEventHandlers>
+
+#include <osgDB/ReadFile>
+
+class GeomLoaderCB : public  osg::NodeCallback
+{
+    int _thresremoval; int _nbaddedatatime;
+    std::list<osg::ref_ptr<osg::Geometry> > _geoms;
+public:
+    GeomLoaderCB(int thresremoval=1, int nbaddedatatime=1):_nbaddedatatime(nbaddedatatime), _thresremoval(thresremoval) {}
+
+    void setGeometryList(const osgUtil::GeometryCollector::GeometryList& geomlist) {
+        for(auto geom : geomlist)  _geoms.push_back(geom);
+    }
+
+    virtual void operator()(osg::Node* node, osg::NodeVisitor* nv) {
+        osg::Group*  gr = node->asGroup();
+        if(!gr || _geoms.empty() ) return;
+
+        if(gr->getNumChildren()>_thresremoval)
+        {
+            osg::Geometry* removedgeom = gr->getChild(0)->asGeometry();
+            if(removedgeom) {
+                OSG_WARN<<"removing "<< removedgeom <<std::endl;
+                gr->removeChildren(0,1);
+            }
+            return;
+        }
+
+        std::list<osg::ref_ptr<osg::Geometry> > ::iterator it= _geoms.begin();
+        int cpt=0;
+        while(it!=_geoms.end() && cpt++<_nbaddedatatime ) {
+            osg::Geometry *addedgeom = static_cast<osg::Geometry*>((*it)->clone(osg::CopyOp::DEEP_COPY_ALL));
+            addedgeom->setUseDisplayList(false);
+            addedgeom->setUseVertexBufferObjects(true);
+            addedgeom->setUseVertexArrayObject(true);
+            gr->addChild(addedgeom);
+            OSG_WARN<<"add "<< addedgeom <<std::endl;
+            it=_geoms.erase(it);
+        }
+        return;
+    }
+
+};
+
+
+int main(int argc, char **argv)
+{
+    osg::ArgumentParser args(&argc,argv);
+    unsigned int  geomcountaddedatatime=1, geomcountabovewichweremove=2;
+    while(args.read("--add",geomcountaddedatatime) ) { }
+    while(args.read("--remove",geomcountabovewichweremove) ) { }
+    osgUtil::GeometryCollector geomcollector(0,osgUtil::Optimizer::ALL_OPTIMIZATIONS);
+
+    osg::ref_ptr<osg::Node > loaded = osgDB::readNodeFiles(args);
+    if(!loaded.valid())  loaded = osgDB::readNodeFile("testdata/BIGCITY.ive");
+    if(loaded.valid())
+    {
+        loaded->accept(geomcollector);
+
+        osg::Group * root=new osg::Group;
+        root->setDataVariance(osg::Object::DYNAMIC);
+        GeomLoaderCB * loader=new GeomLoaderCB(geomcountabovewichweremove,geomcountaddedatatime);
+        loader->setGeometryList( geomcollector.getGeometryList() );
+        loaded=0;
+        root->setUpdateCallback(loader);
+
+        osgViewer::Viewer viewer;
+        viewer.setThreadingModel(osgViewer::ViewerBase::SingleThreaded);
+        viewer.addEventHandler(new osgViewer::StatsHandler);
+        viewer.addEventHandler(new osgViewer::WindowSizeHandler);
+        viewer.addEventHandler(new osgViewer::ThreadingHandler);
+        viewer.setRunFrameScheme(osgViewer::ViewerBase::CONTINUOUS);
+
+        viewer.setSceneData(root);
+
+        viewer.realize();
+        viewer.run();
+    }
+
+}
diff --git a/testdata/BIGCITY.ive.gz b/testdata/BIGCITY.ive.gz
new file mode 100644
index 0000000..769c43a
Binary files /dev/null and b/testdata/BIGCITY.ive.gz differ