Function BM_PlainDecodingBooleanToBitmap

cpp/src/parquet/encoding_benchmark.cc:97–115

BENCHMARK(BM_PlainDecodingBoolean)->Range(MIN_RANGE, MAX_RANGE);

static void BM_PlainDecodingBooleanToBitmap(benchmark::State& state) {
  std::vector<bool> values(state.range(0), true);
  int64_t bitmap_bytes = ::arrow::bit_util::BytesForBits(state.range(0));
  std::vector<uint8_t> output(bitmap_bytes, 0);
  auto encoder = MakeEncoder(Type::BOOLEAN, Encoding::PLAIN);
  auto typed_encoder = dynamic_cast<BooleanEncoder*>(encoder.get());
  typed_encoder->Put(values, static_cast<int>(values.size()));
  std::shared_ptr<Buffer> buf = encoder->FlushValues();

  for (auto _ : state) {
    auto decoder = MakeTypedDecoder<BooleanType>(Encoding::PLAIN);
    decoder->SetData(static_cast<int>(values.size()), buf->data(),
                     static_cast<int>(buf->size()));
    decoder->Decode(output.data(), static_cast<int>(values.size()));
  }
  // Still set `BytesProcessed` to byte level.
  state.SetBytesProcessed(state.iterations() * bitmap_bytes);
  state.SetItemsProcessed(state.iterations() * state.range(0));
}

BENCHMARK(BM_PlainDecodingBooleanToBitmap)->Range(MIN_RANGE, MAX_RANGE);