diff --git a/VolZmapVolume.cpp b/VolZmapVolume.cpp
index cd608cc..8c5b48e 100644
--- a/VolZmapVolume.cpp
+++ b/VolZmapVolume.cpp
@@ -27,7 +27,6 @@
 #include "/EgtDev/Include/EGkSurfBezier.h"
 #include "/EgtDev/Include/ENkPolynomialRoots.h"
 #include "/EgtDev/Include/EGkIntersLineBox.h"
-#include "/EgtDev/Include/EGkGeoObjSave.h"
 #include "SurfBezier.h"
 #include <future>
 #include <numeric>
@@ -1355,8 +1354,6 @@ IntersLineBezierSurfSet( const Point3d& ptLineStart, const Vector3d& vtLineDir,
    fill( vbAlreadyCalc.begin(), vbAlreadyCalc.end(), false) ;
    bool bCalcAll = false ;
 
-   INTVECTOR vSurfCalcInt ;
-
 Reiterate :
 
   // interseco con le bezier
@@ -1401,10 +1398,6 @@ Reiterate :
       // verifico che lo spillone faccia interferenza con il box della superficie
       if ( bCalcInters) {
 
-          //debug
-          vSurfCalcInt.push_back( s) ;
-          //debug
-
          // se la linea è parallela all'asse X o Y allora ruoto tutto di 45 gradi rispetto a Z
          Vector3d a3, a2, a1, a0, b3, b2, b1, b0 ;
          if ( ! bNeedToRot) {
@@ -1539,10 +1532,6 @@ Reiterate :
    return true ;
 }
 
-#if true
-    #define TEST
-#endif
-
 //----------------------------------------------------------------------------
 bool
 VolZmap::Comp_5AxisMilling( int nGrid, const Point3d& ptS, const Point3d& ptE, const Vector3d& vtLs, const Vector3d& vtLe,
@@ -1579,10 +1568,6 @@ VolZmap::Comp_5AxisMilling( int nGrid, const Point3d& ptS, const Point3d& ptE, c
     vector<SurfBezForInters> vSurfBez( nTotSurf) ;
     double dSide = 0 ;
 
-    //debug
-    static PerformanceCounter Counter;
-    //debug
-
    // punti di riferimento sul tool
    // tip del tool
     Point3d ptP1T ;
@@ -1692,13 +1677,6 @@ VolZmap::Comp_5AxisMilling( int nGrid, const Point3d& ptS, const Point3d& ptE, c
         vvPtCtrl.emplace_back( PNTVECTOR( { vPntTopStartFront.back(), vPntTopStartFront.front(), vPntTopEndFront.back(), vPntTopEndFront.front() })) ;
     }
     else {
-
-        
-        {//debug
-        Counter.Start() ;
-        }//debug
-
-
         // costruisco tutti gli archi subito
         // archi inferiori front
         CurveArc cArcTipStartF1, cArcTipEndF1, cArcTipStartF2, cArcTipEndF2 ;
@@ -1912,19 +1890,8 @@ VolZmap::Comp_5AxisMilling( int nGrid, const Point3d& ptS, const Point3d& ptE, c
             PNTVECTOR vPntTopEndBack2 = cBezTopEndB2->GetAllControlPoints() ;
             vvPtCtrl.back().insert( vvPtCtrl.back().end(), vPntTopEndBack2.rbegin(), vPntTopEndBack2.rend()) ;
         }
-
-        {//debug
-        static double dCreationTime = 0;
-        dCreationTime += Counter.Stop();
-        string sOut = "bezier_creation = " + ToString( dCreationTime, 3) ;
-        LOG_INFO( GetEGkLogger(), sOut.c_str())
-        }//debug
     }
 
-    //debug
-    vector<IGeoObj*> vGeo;
-    //debug
-
     // inizializzo le superfici bilineari e i parametri per le intersezioni
     for ( int z = 0 ; z < int( vvPtCtrl.size()) ; ++z) {
         vSurfBez[nSurfInd].sBez.Init( nDegU, nDegV, nSpanU, nSpanV, bRat) ;
@@ -1977,27 +1944,9 @@ VolZmap::Comp_5AxisMilling( int nGrid, const Point3d& ptS, const Point3d& ptE, c
             vSurfBez[nSurfInd].bbSurfOriented.Add( vPtCtrlLoc) ;
         }
 
-#ifdef TEST
-        if (nGrid == 0)
-            vGeo.push_back(vSurfBez[nSurfInd].sBez.Clone()) ;
-#endif
-
         ++ nSurfInd ;
     }
 
-#ifdef TEST
-    if (nGrid == 0) {
-        bStepAlreadyCounted = false;
-        ++nStepCounter;
-    }
-
-    if (false) {
-        vector<Color> vCol( nTotSurf) ;
-        fill( vCol.begin(), vCol.end(), Color( 255,128,0)) ;
-        SaveGeoObj( vGeo, vCol, "D:/Temp/VirtualMilling/5axisAdvanced/finalApprox.nge") ;
-    }
-#endif
-
    // scorro tutti gli spilloni interessati
    int j = 0 ;
    int nLastForwardJ = -1 ;
@@ -2015,10 +1964,6 @@ VolZmap::Comp_5AxisMilling( int nGrid, const Point3d& ptS, const Point3d& ptE, c
    } ;
    vector<IntervalsToSubtract> vIntervalsToSubtr ;
 
-   {//debug
-       Counter.Start();
-   }//debug
-
    for ( int i = nStartI ; i <= nEndI ; ++ i) {
       nLastForwardJ = -1 ;
       j = nStartJ ;
@@ -2042,13 +1987,6 @@ VolZmap::Comp_5AxisMilling( int nGrid, const Point3d& ptS, const Point3d& ptE, c
          if ( vDexel.size() != 0) {
             IntersLineBezierSurfSet( r, q, vSurfBez, vInters, vSurfInters, vtLs, vInterv) ;
 
-            //debug
-            if (vInters.size() > 1 && !bStepAlreadyCounted) {
-                bStepAlreadyCounted = true;
-                ++nStepWithCalc;
-            }
-            //debug
-
             if ( vInters.size() > 2) {
                SortGroupInters( vInters, vStartEnds, Z_AX) ;
                if ( bForward  &&  vStartEnds.size() > 1) {
@@ -2163,13 +2101,6 @@ VolZmap::Comp_5AxisMilling( int nGrid, const Point3d& ptS, const Point3d& ptE, c
       }
    }
 
-   {//debug
-       static double dCalcTime = 0;
-       dCalcTime += Counter.Stop();
-       string sOut = "inters_calc = " + ToString(dCalcTime, 3);
-       LOG_INFO(GetEGkLogger(), sOut.c_str())
-   }//debug
-
    return true ;
 }
 
@@ -2429,7 +2360,7 @@ VolZmap::MillingGeneralMotionStep( const Point3d& ptPs, const Vector3d& vtDs, co
       InitializePointsAndVectors( ptSti, ptEni, vtDSi, vtDEi, ptLs, ptLe, vtLs, vtLe) ;
 
       // Standard è multithread
-      constexpr bool MULTITHREAD = false ;
+      constexpr bool MULTITHREAD = true ;
       if ( MULTITHREAD) {
          // Ciclo sulle mappe
          vector<future<bool>> vRes( m_nMapNum) ;