From 1427275abd07845cee6520db48de8e1f7243b65b Mon Sep 17 00:00:00 2001
From: Arne Morten Kvarving <arne.morten.kvarving@sintef.no>
Date: Fri, 17 Nov 2023 12:37:52 +0100
Subject: [PATCH] avoid copying strings

---
 src/opm/io/eclipse/ESmry.cpp | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/opm/io/eclipse/ESmry.cpp b/src/opm/io/eclipse/ESmry.cpp
index a0fbfc310..f8e2eff4a 100644
--- a/src/opm/io/eclipse/ESmry.cpp
+++ b/src/opm/io/eclipse/ESmry.cpp
@@ -1097,7 +1097,7 @@ bool ESmry::make_esmry_file()
             std::vector<std::string> units;
             units.reserve(keyword.size());
 
-            for (auto key : keyword)
+            for (const auto& key : keyword)
                 units.push_back(kwunits.at(key));