Additional YaspGrid short cut for skeleton terms

python/dune/perftool/sumfact/switch.py

@@ -56,6 +56,11 @@ def decide_if_kernel_is_necessary(facedir_s, facemod_s, facedir_n, facemod_n):
     if not get_option("diagonal_transformation_matrix"):
         return True
 
+    # The PDELab machineries visit-once policy combined with Yasp avoids any visits
+    # with facemod_s being True
+    if facemod_s:
+        return False
+
     # A codim1 entity can never be on the upper resp. lower side of the ref element
     # in both inside and outside cell in a YaspGrid
     if facemod_n == facemod_s: