diff --git a/source/MRMesh/MRObjectMeshHolder.cpp b/source/MRMesh/MRObjectMeshHolder.cpp
index def9972455d5..7a40fc78205b 100644
--- a/source/MRMesh/MRObjectMeshHolder.cpp
+++ b/source/MRMesh/MRObjectMeshHolder.cpp
@@ -763,8 +763,22 @@ size_t ObjectMeshHolder::numHandles() const
 
 void ObjectMeshHolder::setDirtyFlags( uint32_t mask, bool invalidateCaches )
 {
-    VisualObject::setDirtyFlags( mask, invalidateCaches );
+    invalidateMetricsCache( mask );
+    setDirtyFlagsFast( mask );
 
+    if ( invalidateCaches && ( mask & DIRTY_POSITION || mask & DIRTY_FACE ) && data_.mesh )
+        data_.mesh->invalidateCaches();
+}
+
+void ObjectMeshHolder::setDirtyFlagsFast( uint32_t mask )
+{
+    VisualObject::setDirtyFlags( mask );
+    if ( ( mask & DIRTY_POSITION || mask & DIRTY_FACE ) && data_.mesh )
+        meshChangedSignal( mask );
+}
+
+void ObjectMeshHolder::invalidateMetricsCache( uint32_t mask )
+{
     if ( mask & DIRTY_FACE )
     {
         numHoles_.reset();
@@ -782,16 +796,6 @@ void ObjectMeshHolder::setDirtyFlags( uint32_t mask, bool invalidateCaches )
         selectedArea_.reset();
         volume_.reset();
         avgEdgeLen_.reset();
-        if ( invalidateCaches && data_.mesh )
-            data_.mesh->invalidateCaches();
-    }
-
-    if ( mask & DIRTY_POSITION || mask & DIRTY_FACE)
-    {
-        if ( data_.mesh )
-        {
-            meshChangedSignal( mask );
-        }
     }
 }
 
diff --git a/source/MRMesh/MRObjectMeshHolder.h b/source/MRMesh/MRObjectMeshHolder.h
index 6cb765897ad7..3bf731f2ed02 100644
--- a/source/MRMesh/MRObjectMeshHolder.h
+++ b/source/MRMesh/MRObjectMeshHolder.h
@@ -64,6 +64,14 @@ class MRMESH_CLASS ObjectMeshHolder : public VisualObject
 
     MRMESH_API virtual void setDirtyFlags( uint32_t mask, bool invalidateCaches = true ) override;
 
+    /// this is a faster version of setDirtyFlags(), which does not invalidate metrics cache (area, volume, ...);
+    /// the user is responsible for calling invalidateMetricsCache( mask ) or setDirtyFlags( mask ) at the end of mesh editing;
+    /// DANGER: all cached values returned until then can be outdated
+    MRMESH_API virtual void setDirtyFlagsFast( uint32_t mask );
+
+    /// invalidates same caches with mesh metrics (area, volume, ...) as by setDirtyFlags( mask )
+    MRMESH_API virtual void invalidateMetricsCache( uint32_t mask );
+
     const FaceBitSet& getSelectedFaces() const { return data_.selectedFaces; }
     MRMESH_API virtual void selectFaces( FaceBitSet newSelection );
     /// returns colors of selected triangles
diff --git a/source/MRViewer/MRSurfaceManipulationWidget.cpp b/source/MRViewer/MRSurfaceManipulationWidget.cpp
index 098b74b2cbb1..af34ee01493e 100644
--- a/source/MRViewer/MRSurfaceManipulationWidget.cpp
+++ b/source/MRViewer/MRSurfaceManipulationWidget.cpp
@@ -466,6 +466,8 @@ bool SurfaceManipulationWidget::onMouseUp_( Viewer::MouseButton button, int /*mo
         updateValueChanges_( generalEditingRegion_ );
         obj_->setDirtyFlags( DIRTY_POSITION );
     }
+    else
+        invalidateMetricsCache_();
 
     generalEditingRegion_.clear();
     generalEditingRegion_.resize( numV, false );
@@ -598,7 +600,7 @@ void SurfaceManipulationWidget::changeSurface_()
         params.region = &singleEditingRegion_;
         params.force = settings_.relaxForce;
         relax( *obj_->varMesh(), params );
-        obj_->setDirtyFlags( DIRTY_POSITION );
+        obj_->setDirtyFlagsFast( DIRTY_POSITION );
         updateValueChanges_( singleEditingRegion_ );
         return;
     }
@@ -610,6 +612,7 @@ void SurfaceManipulationWidget::changeSurface_()
         normal += mesh.dirDblArea( v );
     normal = normal.normalized();
 
+    obj_->varMesh()->invalidateCaches();
     auto& points = obj_->varMesh()->points;
 
     const float maxShift = settings_.editForce;
@@ -634,7 +637,7 @@ void SurfaceManipulationWidget::changeSurface_()
     generalEditingRegion_ |= singleEditingRegion_;
     changedRegion_ |= singleEditingRegion_;
     updateValueChanges_( singleEditingRegion_ );
-    obj_->setDirtyFlags( DIRTY_POSITION );
+    obj_->setDirtyFlagsFast( DIRTY_POSITION );
 }
 
 void SurfaceManipulationWidget::updateUVmap_( bool set, bool wholeMesh )
@@ -750,12 +753,23 @@ void SurfaceManipulationWidget::updateRegion_( const Vector2f& mousePos )
     singleEditingRegion_ -= unchangeableVerts_;
 }
 
+void SurfaceManipulationWidget::invalidateMetricsCache_()
+{
+    // if not-Patch mode and some surface change was done without metrics update
+    if ( !appendHistoryAction_ && historyAction_ )
+    {
+        assert( settings_.workMode != WorkMode::Patch );
+        obj_->invalidateMetricsCache( DIRTY_POSITION );
+    }
+}
+
 void SurfaceManipulationWidget::abortEdit_()
 {
     if ( !mousePressed_ )
         return;
     mousePressed_ = false;
     removeLastStableObjMesh_();
+    invalidateMetricsCache_();
     appendHistoryAction_ = false;
     historyAction_.reset();
     generalEditingRegion_.clear();
diff --git a/source/MRViewer/MRSurfaceManipulationWidget.h b/source/MRViewer/MRSurfaceManipulationWidget.h
index 184a9ffa78ab..9ed5c56db0d8 100644
--- a/source/MRViewer/MRSurfaceManipulationWidget.h
+++ b/source/MRViewer/MRSurfaceManipulationWidget.h
@@ -122,6 +122,7 @@ class MRVIEWER_CLASS SurfaceManipulationWidget :
     void changeSurface_();
     void updateUVmap_( bool set, bool wholeMesh = false );
     void updateRegion_( const Vector2f& mousePos );
+    void invalidateMetricsCache_();
     void abortEdit_();
     /// Laplacian
     void laplacianPickVert_( const PointOnFace& pick );