From 40f95191a0ede92e54d01bf2eae6dc486e703aea Mon Sep 17 00:00:00 2001
From: "Daniel J. Hofmann" <daniel@trvx.org>
Date: Mon, 14 Mar 2016 16:24:51 +0100
Subject: [PATCH] Do not copy pairs in loop

---
 include/engine/routing_algorithms/routing_base.hpp | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/include/engine/routing_algorithms/routing_base.hpp b/include/engine/routing_algorithms/routing_base.hpp
index 3d33edf6f..4fef4291a 100644
--- a/include/engine/routing_algorithms/routing_base.hpp
+++ b/include/engine/routing_algorithms/routing_base.hpp
@@ -630,7 +630,7 @@ template <class DataFacadeT, class Derived> class BasicRoutingInterface
         NodeID last_id = SPECIAL_NODEID;
         forward_core_heap.Clear();
         reverse_core_heap.Clear();
-        for (const auto p : forward_entry_points)
+        for (const auto& p : forward_entry_points)
         {
             if (p.first == last_id)
             {
@@ -640,7 +640,7 @@ template <class DataFacadeT, class Derived> class BasicRoutingInterface
             last_id = p.first;
         }
         last_id = SPECIAL_NODEID;
-        for (const auto p : reverse_entry_points)
+        for (const auto& p : reverse_entry_points)
         {
             if (p.first == last_id)
             {