Function BM_ReadColumn

cpp/src/parquet/arrow/reader_writer_benchmark.cc:346–359

template <bool nullable, typename ParquetType>
static void BM_ReadColumn(::benchmark::State& state) {
  using T = typename ParquetType::c_type;

  auto values = RandomVector<T>(/*percentage=*/state.range(1), BENCHMARK_SIZE,
                                Examples<T>::values());

  std::shared_ptr<Table> table =
      TableFromVector<ParquetType>(values, nullable, state.range(0));

  auto properties = WriterProperties::Builder().disable_dictionary()->build();

  BenchmarkReadTable(state, *table, properties, table->num_rows(),
                     BytesForItems<ParquetType>(table->num_rows()));
}

// There are two parameters here that cover different data distributions.
// null_percentage governs distribution and therefore runs of null values.