Function GenerateLevels

cpp/src/parquet/column_reader_benchmark.cc:273–284

    ->Args({2, 10000, 1000000});

void GenerateLevels(int level_repeats, int max_level, int num_levels,
                    std::vector<int16_t>* levels) {
  // Generate random levels
  std::default_random_engine gen(/*seed=*/1943);
  std::uniform_int_distribution<int16_t> d(0, max_level);
  for (int i = 0; i < num_levels;) {
    int16_t current_level = d(gen);  // level repeat `level_repeats` times
    const int current_repeated = std::min(level_repeats, num_levels - i);
    levels->insert(levels->end(), current_repeated, current_level);
    i += current_repeated;
  }
}

void EncodeLevels(Encoding::type encoding, int16_t max_level, int num_levels,
                  const int16_t* input_levels, std::vector<uint8_t>* bytes) {