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1//===----------------------------------------------------------------------===//2//3// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.4// See https://llvm.org/LICENSE.txt for license information.5// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception6//7//===----------------------------------------------------------------------===//8 9// UNSUPPORTED: c++03, c++11, c++14, c++1710 11#include <algorithm>12#include <cstddef>13#include <deque>14#include <iterator>15#include <list>16#include <string>17#include <vector>18 19#include "benchmark/benchmark.h"20#include "../../GenerateInput.h"21 22int main(int argc, char** argv) {23  auto std_transform = [](auto first, auto last, auto out, auto f) { return std::transform(first, last, out, f); };24 25  // {std,ranges}::transform(normal container)26  {27    auto bm = []<class Container>(std::string name, auto transform) {28      benchmark::RegisterBenchmark(29          name,30          [transform](auto& st) {31            std::size_t const size = st.range(0);32            using ValueType        = typename Container::value_type;33            Container c;34            std::generate_n(std::back_inserter(c), size, [] { return Generate<ValueType>::random(); });35 36            std::vector<ValueType> out(size);37 38            auto f = [](auto element) {39              benchmark::DoNotOptimize(element);40              return element;41            };42 43            for ([[maybe_unused]] auto _ : st) {44              benchmark::DoNotOptimize(c);45              benchmark::DoNotOptimize(out);46              auto result = transform(c.begin(), c.end(), out.begin(), f);47              benchmark::DoNotOptimize(result);48            }49          })50          ->Arg(32)51          ->Arg(50) // non power-of-two52          ->Arg(1024)53          ->Arg(8192);54    };55    bm.operator()<std::vector<int>>("std::transform(vector<int>) (identity transform)", std_transform);56    bm.operator()<std::deque<int>>("std::transform(deque<int>) (identity transform)", std_transform);57    bm.operator()<std::list<int>>("std::transform(list<int>) (identity transform)", std_transform);58    bm.operator()<std::vector<int>>("rng::transform(vector<int>) (identity transform)", std::ranges::transform);59    bm.operator()<std::deque<int>>("rng::transform(deque<int>) (identity transform)", std::ranges::transform);60    bm.operator()<std::list<int>>("rng::transform(list<int>) (identity transform)", std::ranges::transform);61  }62 63  benchmark::Initialize(&argc, argv);64  benchmark::RunSpecifiedBenchmarks();65  benchmark::Shutdown();66  return 0;67}68