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-exception |
6 | // |
7 | //===----------------------------------------------------------------------===// |
8 | |
9 | // UNSUPPORTED: c++03, c++11, c++14, c++17 |
10 | |
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 | |
22 | int main(int argc, char** argv) { |
23 | auto std_rotate_copy = [](auto first, auto middle, auto last, auto out) { |
24 | return std::rotate_copy(first, middle, last, out); |
25 | }; |
26 | |
27 | // {std,ranges}::rotate_copy(normal container) |
28 | { |
29 | auto bm = []<class Container>(std::string name, auto rotate_copy) { |
30 | benchmark::RegisterBenchmark( |
31 | name, |
32 | [rotate_copy](auto& st) { |
33 | std::size_t const size = st.range(0); |
34 | using ValueType = typename Container::value_type; |
35 | Container c; |
36 | std::generate_n(std::back_inserter(c), size, [] { return Generate<ValueType>::random(); }); |
37 | |
38 | std::vector<ValueType> out(size); |
39 | |
40 | auto middle = std::next(c.begin(), size / 2); |
41 | for ([[maybe_unused]] auto _ : st) { |
42 | benchmark::DoNotOptimize(c); |
43 | benchmark::DoNotOptimize(out); |
44 | auto result = rotate_copy(c.begin(), middle, c.end(), out.begin()); |
45 | benchmark::DoNotOptimize(result); |
46 | } |
47 | }) |
48 | ->Arg(32) |
49 | ->Arg(50) // non power-of-two |
50 | ->Arg(1024) |
51 | ->Arg(8192); |
52 | }; |
53 | bm.operator()<std::vector<int>>(name: "std::rotate_copy(vector<int>)" , rotate_copy: std_rotate_copy); |
54 | bm.operator()<std::deque<int>>(name: "std::rotate_copy(deque<int>)" , rotate_copy: std_rotate_copy); |
55 | bm.operator()<std::list<int>>(name: "std::rotate_copy(list<int>)" , rotate_copy: std_rotate_copy); |
56 | bm.operator()<std::vector<int>>("rng::rotate_copy(vector<int>)" , std::ranges::rotate_copy); |
57 | bm.operator()<std::deque<int>>("rng::rotate_copy(deque<int>)" , std::ranges::rotate_copy); |
58 | bm.operator()<std::list<int>>("rng::rotate_copy(list<int>)" , std::ranges::rotate_copy); |
59 | } |
60 | |
61 | benchmark::Initialize(&argc, argv); |
62 | benchmark::RunSpecifiedBenchmarks(); |
63 | benchmark::Shutdown(); |
64 | return 0; |
65 | } |
66 | |