ext/flydata/json/json_ext.cpp in flydata-0.5.16 vs ext/flydata/json/json_ext.cpp in flydata-0.5.17

@@ -260,10 +260,10 @@
 
     add_kv_pair(key, value, ss);
   }
   ss << "}";
 
-  std::string str = ss.str();
+  const std::string& str = ss.str();
   VALUE json = rb_str_new(str.data(), str.size());
   int enc = rb_enc_find_index("UTF-8");
   rb_enc_associate_index(json, enc);
 
   return json;