From e26ef17545fd1eeb01a8c95588bb273b6122d628 Mon Sep 17 00:00:00 2001
From: Dennis Luxen <info@project-osrm.org>
Date: Sat, 1 Nov 2014 17:32:49 -0400
Subject: [PATCH] reserve delta vector beforehand to avoid realocations.

---
 Algorithms/polyline_compressor.cpp | 1 +
 1 file changed, 1 insertion(+)

diff --git a/Algorithms/polyline_compressor.cpp b/Algorithms/polyline_compressor.cpp
index 87c6e51d7..15e405d36 100644
--- a/Algorithms/polyline_compressor.cpp
+++ b/Algorithms/polyline_compressor.cpp
@@ -81,6 +81,7 @@ PolylineCompressor::get_encoded_string(const std::vector<SegmentInformation> &po
     }
 
     std::vector<int> delta_numbers;
+    delta_numbers.reserve((polyline.size() - 1) * 2);
     FixedPointCoordinate previous_coordinate = {0, 0};
     for (const auto &segment : polyline)
     {