void BM_tbb()

in benchmarks/nested_for_benchmark.cpp [183:206]

• 21 lines of code
• 3 McCabe index (conditional complexity)

void BM_tbb(benchmark::State& state) {
  g_numThreads = state.range(0);
  const int numElements = state.range(1);

  uint64_t sum = 0;

  int foo = 0;

  auto input = getInputs(numElements);
  for (auto UNUSED_VAR : state) {
    tbb::task_scheduler_init initsched(g_numThreads);
    ++foo;
    sum = tbb::parallel_reduce(
        tbb::blocked_range<size_t>(0, numElements),
        uint64_t{0},
        [numElements, input, foo](const tbb::blocked_range<size_t>& r, uint64_t init) -> uint64_t {
          for (size_t a = r.begin(); a != r.end(); ++a)
            init += calculateInnerTbb(input, foo, numElements);
          return init;
        },
        [](uint64_t x, uint64_t y) -> uint64_t { return x + y; });
  }
  checkResults(input, sum, foo, numElements);
}