Function BM_ByteStreamSplitEncode

cpp/src/parquet/encoding_benchmark.cc:425–437

template <typename T, typename EncodeFunc>
static void BM_ByteStreamSplitEncode(benchmark::State& state, EncodeFunc&& encode_func) {
  const std::vector<T> values(state.range(0), ByteStreamSplitDummyValue<T>::value());
  const uint8_t* values_raw = reinterpret_cast<const uint8_t*>(values.data());
  std::vector<uint8_t> output(state.range(0) * sizeof(T));

  for (auto _ : state) {
    encode_func(values_raw, /*width=*/static_cast<int>(sizeof(T)), values.size(),
                output.data());
    benchmark::ClobberMemory();
  }
  state.SetBytesProcessed(state.iterations() * values.size() * sizeof(T));
  state.SetItemsProcessed(state.iterations() * values.size());
}

static void BM_ByteStreamSplitDecode_Float_Generic(benchmark::State& state) {
  BM_ByteStreamSplitDecode<float>(state, ::arrow::util::internal::ByteStreamSplitDecode);