From: Wolfgang Bangerth <bangerth@colostate.edu>
Date: Thu, 2 Jun 2022 13:54:53 +0000 (-0600)
Subject: Pre-allocate the size of an array.
X-Git-Tag: v9.5.0-rc1~1036^2
X-Git-Url: https://gitweb.dealii.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=refs%2Fpull%2F13895%2Fhead;p=dealii.git

Pre-allocate the size of an array.
---

diff --git a/source/base/mpi_compute_index_owner_internal.cc b/source/base/mpi_compute_index_owner_internal.cc
index 8f1dd43b96..c96e46a9f0 100644
--- 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;
                 }(),