Correct buffer size

python/dune/perftool/sumfact/realization.py

@@ -87,7 +87,8 @@ def _realize_sum_factorization_kernel(sf):
     for buf in buffers:
         # Determine the necessary size of the buffer. We assume that we do not
         # underintegrate the form!!!
-        size = product(m.quadrature_size for m in sf.matrix_sequence) * sf.vector_width
+        size = max(product(m.quadrature_size for m in sf.matrix_sequence) * sf.vector_width,
+                   product(m.basis_size for m in sf.matrix_sequence) * sf.vector_width)
         temporary_variable("{}_dummy".format(buf),
                            shape=(size,),
                            custom_base_storage=buf,