Pre-allocate up-front whenever possible

src/extractor/extractor_callbacks.cpp

@@ -193,6 +193,9 @@ void ExtractorCallbacks::ProcessWay(const osmium::Way &input_way, const Extracti
                             ((parsed_way.forward_speed != parsed_way.backward_speed) ||
                              (parsed_way.forward_travel_mode != parsed_way.backward_travel_mode));
 
+    external_memory.used_node_id_list.reserve(external_memory.used_node_id_list.size() +
+                                              input_way.nodes().size());
+
     std::transform(input_way.nodes().begin(),
                    input_way.nodes().end(),
                    std::back_inserter(external_memory.used_node_id_list),

src/extractor/suffix_table.cpp

@@ -5,7 +5,6 @@
 
 #include <boost/algorithm/string.hpp>
 #include <boost/assert.hpp>
-#include <boost/range/adaptor/transformed.hpp>
 #include <boost/ref.hpp>
 
 #include <iterator>

src/server/request_handler.cpp

@@ -105,9 +105,11 @@ void RequestHandler::HandleRequest(const http::request &current_request, http::r
         else
         {
             BOOST_ASSERT(result.is<std::string>());
+            current_reply.content.resize(current_reply.content.size() +
+                                         result.get<std::string>().size());
             std::copy(result.get<std::string>().cbegin(),
                       result.get<std::string>().cend(),
-                      std::back_inserter(current_reply.content));
+                      current_reply.content.end());
 
             current_reply.headers.emplace_back("Content-Type", "application/x-protobuf");
         }