Function compare_6d

test/speed_root.cpp:75–91

}

void compare_6d(unsigned n, int distrib) {
  auto r = random_array(n, distrib);

  double best_root = std::numeric_limits<double>::max();
  for (unsigned k = 0; k < 20; ++k) {
    std::vector<int> bin(6, 10);
    std::vector<double> min(6, 0);
    std::vector<double> max(6, 1);
    THnI hroot("", "", 6, &bin.front(), &min.front(), &max.front());

    auto t = clock();
    for (unsigned i = 0; i < n / 6; ++i) { hroot.Fill(r.get() + 6 * i); }
    t = clock() - t;
    best_root = std::min(best_root, double(t) / CLOCKS_PER_SEC);
  }
  printf("root %.3f\n", best_root);
}

int main(int argc, char** argv) {
  constexpr unsigned nfill = 6000000;