Function DictEncodeAll

be/src/benchmarks/parquet-delta-benchmark.cc:184–219

template <typename INT_T>
std::pair<std::vector<uint8_t>, int> DictEncodeAll(const std::vector<INT_T>& plain) {
  MemTracker track_encoder;
  MemTracker tracker;
  MemPool pool(&tracker);

  int dict_len;
  std::vector<uint8_t> output;

  {
    DictEncoder<INT_T> encoder(&pool, sizeof(INT_T), &track_encoder);

    for (const INT_T value : plain) {
      int success = encoder.Put(value);
      DCHECK_GE(success, 0);
    }

    dict_len = encoder.dict_encoded_size();
    const int data_len = encoder.EstimatedDataEncodedSize();

    output = std::vector<uint8_t>(dict_len + data_len, 0);

    encoder.WriteDict(output.data());
    const int data_written = encoder.WriteData(output.data() + dict_len, data_len);
    DCHECK_GE(data_written, 0);

    output.resize(dict_len + data_written);

    encoder.Close();
  }

  pool.FreeAll();
  tracker.Close();
  track_encoder.Close();

  return std::make_pair(output, dict_len);
}

/// This struct holds the information that is given to the benchmark functions.
struct DeltaBenchmarkData {