From: Wolfgang Bangerth <bangerth@colostate.edu>
Date: Tue, 29 Nov 2022 15:43:48 +0000 (-0700)
Subject: Don't make copies of expensive objects.
X-Git-Tag: v9.5.0-rc1~794^2
X-Git-Url: https://gitweb.dealii.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=refs%2Fpull%2F14492%2Fhead;p=dealii.git

Don't make copies of expensive objects.
---

diff --git a/source/dofs/dof_renumbering.cc b/source/dofs/dof_renumbering.cc
index 3486224312..c80b473594 100644
--- a/source/dofs/dof_renumbering.cc
+++ b/source/dofs/dof_renumbering.cc
@@ -759,8 +759,8 @@ namespace DoFRenumbering
                          const std::vector<unsigned int> &component_order_arg,
                          const bool                       is_level_operation)
   {
-    const hp::FECollection<dim, spacedim> fe_collection(
-      start->get_dof_handler().get_fe_collection());
+    const hp::FECollection<dim, spacedim> &fe_collection =
+      start->get_dof_handler().get_fe_collection();
 
     // do nothing if the FE has only
     // one component
@@ -1072,8 +1072,8 @@ namespace DoFRenumbering
                      const ENDITERATOR &                   end,
                      const bool                            is_level_operation)
   {
-    const hp::FECollection<dim, spacedim> fe_collection(
-      start->get_dof_handler().get_fe_collection());
+    const hp::FECollection<dim, spacedim> &fe_collection =
+      start->get_dof_handler().get_fe_collection();
 
     // do nothing if the FE has only
     // one component