Function AllocateTouchDeallocate

cpp/src/arrow/memory_pool_benchmark.cc:103–116

// Benchmark the cost of allocating memory plus accessing it.
template <typename Alloc>
static void AllocateTouchDeallocate(
    benchmark::State& state) {  // NOLINT non-const reference
  const int64_t nbytes = state.range(0);
  MemoryPool* pool = *Alloc::GetAllocator();

  for (auto _ : state) {
    uint8_t* data;
    ARROW_CHECK_OK(pool->Allocate(nbytes, &data));
    TouchCacheLines(data, nbytes);
    pool->Free(data, nbytes);
  }
  state.SetItemsProcessed(state.iterations());
  state.SetBytesProcessed(state.iterations() * nbytes);
}

#define BENCHMARK_ALLOCATE_ARGS       \
  ->RangeMultiplier(16)               \