tests: add ndn::tlv::readVarNumber benchmark

refs #4097

Change-Id: Ib19f55366850a91ac3232ee27810a7258fce47ce
diff --git a/tests/integrated/timed-execute.hpp b/tests/integrated/timed-execute.hpp
new file mode 100644
index 0000000..7f71e72
--- /dev/null
+++ b/tests/integrated/timed-execute.hpp
@@ -0,0 +1,43 @@
+/* -*- Mode:C++; c-file-style:"gnu"; indent-tabs-mode:nil; -*- */
+/*
+ * Copyright (c) 2013-2017 Regents of the University of California.
+ *
+ * This file is part of ndn-cxx library (NDN C++ library with eXperimental eXtensions).
+ *
+ * ndn-cxx library is free software: you can redistribute it and/or modify it under the
+ * terms of the GNU Lesser General Public License as published by the Free Software
+ * Foundation, either version 3 of the License, or (at your option) any later version.
+ *
+ * ndn-cxx library is distributed in the hope that it will be useful, but WITHOUT ANY
+ * WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A
+ * PARTICULAR PURPOSE.  See the GNU Lesser General Public License for more details.
+ *
+ * You should have received copies of the GNU General Public License and GNU Lesser
+ * General Public License along with ndn-cxx, e.g., in COPYING.md file.  If not, see
+ * <http://www.gnu.org/licenses/>.
+ *
+ * See AUTHORS.md for complete list of ndn-cxx authors and contributors.
+ */
+
+#ifndef NDN_TESTS_INTEGRATED_TIMED_EXECUTE_HPP
+#define NDN_TESTS_INTEGRATED_TIMED_EXECUTE_HPP
+
+#include "util/time.hpp"
+
+namespace ndn {
+namespace tests {
+
+template<typename F>
+time::nanoseconds
+timedExecute(const F& f)
+{
+  auto before = time::steady_clock::now();
+  f();
+  auto after = time::steady_clock::now();
+  return after - before;
+}
+
+} // namespace tests
+} // namespace ndn
+
+#endif // NDN_TESTS_INTEGRATED_TIMED_EXECUTE_HPP