Pre-allocate the size of an array.

dealii · Jun 2, 2022 · c0823a5 · c0823a5
1 parent 98a42a7
commit c0823a5
Showing 1 changed file with 2 additions and 1 deletion.
diff --git a/source/base/mpi_compute_index_owner_internal.cc b/source/base/mpi_compute_index_owner_internal.cc
@@ -354,8 +354,9 @@ namespace Utilities
                 /* targets = */
                 [&buffers]() {
                   std::vector<unsigned int> targets;
+                  targets.reserve(buffers.size());
                   for (const auto &rank_pair : buffers)
-                    targets.push_back(rank_pair.first);
+                    targets.emplace_back(rank_pair.first);
 
                   return targets;
                 }(),