Function ReferenceDecompression

cpp/src/arrow/util/compression_benchmark.cc:210–229

template <Compression::type COMPRESSION>
static void ReferenceDecompression(
    benchmark::State& state) {                        // NOLINT non-const reference
  auto data = MakeCompressibleData(8 * 1024 * 1024);  // 8 MB

  auto codec = *Codec::Create(COMPRESSION);

  std::vector<uint8_t> compressed_data;
  ARROW_UNUSED(Compress(codec.get(), data, &compressed_data));
  state.counters["ratio"] =
      static_cast<double>(data.size()) / static_cast<double>(compressed_data.size());

  std::vector<uint8_t> decompressed_data(data);
  while (state.KeepRunning()) {
    auto result = codec->Decompress(compressed_data.size(), compressed_data.data(),
                                    decompressed_data.size(), decompressed_data.data());
    ARROW_CHECK(result.ok());
    ARROW_CHECK(*result == static_cast<int64_t>(decompressed_data.size()));
  }
  state.SetBytesProcessed(state.iterations() * data.size());
}

#  ifdef ARROW_WITH_ZLIB
BENCHMARK_TEMPLATE(ReferenceStreamingCompression, Compression::GZIP);