message: modified the timer
diff: @@ -1013,14 +1013,14 @@ BP4Serializer::DeserializeIndicesPerRankThreads(
  const bool isRankConstant) {
  size_t localPosition = serializedPosition;
  - std::chrono::high_resolution_clock::time_point t_start, t_end ;
  - t_start = std::chrono::high_resolution_clock::now();
  + double timeStart, timeEnd, duration;
  + timeStart = MPI_Wtime();
  ElementIndexHeader header =
  ReadElementIndexHeader(serialized, localPosition);
  - t_end = std::chrono::high_resolution_clock::now();
  + timeEnd = MPI_Wtime();
  - auto duration1 = std::chrono::duration_cast<std::chrono::seconds>(t_end - t_start).count();
  - std::cout << "ElementIndexHeader header = ReadElementIndexHeader(..., took " << duration1 << " seconds" << std::endl;
  + duration = timeEnd-timeStart;
  + std::cout << "ElementIndexHeader header = ReadElementIndexHeader(..., took " << duration << " seconds" << std::endl;
  if (isRankConstant)
  {
  @@ -1032,15 +1032,15 @@ BP4Serializer::DeserializeIndicesPerRankThreads(
  std::vector<BP4Base::SerialElementIndex> *deserializedIndexes;
  - t_start = std::chrono::high_resolution_clock::now();
  + timeStart = MPI_Wtime();
  deserializedIndexes = &(deserialized.emplace(std::piecewise_construct,
  std::forward_as_tuple(header.Name),
  std::forward_as_tuple(
  m_SizeMPI, SerialElementIndex(header.MemberID, 0))).first->second);
  - t_end = std::chrono::high_resolution_clock::now();
  + timeEnd = MPI_Wtime();
  - auto duration2 = std::chrono::duration_cast<std::chrono::seconds>(t_end - t_start).count();
  - std::cout << "deserializedIndexes = &(deserialized.emplace(..., took " << duration2 << " seconds" << std::endl;
  + duration = timeEnd-timeStart;
  + std::cout << "deserializedIndexes = &(deserialized.emplace(..., took " << duration << " seconds" << std::endl;
  const size_t bufferSize = static_cast<size_t>(header.Length) + 4;
  SerialElementIndex &index = deserializedIndexes->at(rankSource);
  