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//===----------------------------------------------------------------------===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
// UNSUPPORTED: c++03, c++11, c++14, c++17
#include <algorithm>
#include <cstddef>
#include <deque>
#include <iterator>
#include <list>
#include <string>
#include <vector>
#include "benchmark/benchmark.h"
#include "../../GenerateInput.h"
int main(int argc, char** argv) {
auto std_generate_n = [](auto out, auto n, auto f) { return std::generate_n(out, n, f); };
// {std,ranges}::generate_n
{
auto bm = []<class Container>(std::string name, auto generate_n) {
benchmark::RegisterBenchmark(
name,
[generate_n](auto& st) {
std::size_t const size = st.range(0);
Container c(size);
using ValueType = typename Container::value_type;
ValueType x = Generate<ValueType>::random();
for ([[maybe_unused]] auto _ : st) {
benchmark::DoNotOptimize(c);
generate_n(c.begin(), size, [&x] {
benchmark::DoNotOptimize(x);
return x;
});
benchmark::DoNotOptimize(c);
}
})
->Arg(32)
->Arg(50) // non power-of-two
->Arg(1024)
->Arg(8192);
};
bm.operator()<std::vector<int>>("std::generate_n(vector<int>)", std_generate_n);
bm.operator()<std::deque<int>>("std::generate_n(deque<int>)", std_generate_n);
bm.operator()<std::list<int>>("std::generate_n(list<int>)", std_generate_n);
bm.operator()<std::vector<int>>("rng::generate_n(vector<int>)", std::ranges::generate_n);
bm.operator()<std::deque<int>>("rng::generate_n(deque<int>)", std::ranges::generate_n);
bm.operator()<std::list<int>>("rng::generate_n(list<int>)", std::ranges::generate_n);
}
benchmark::Initialize(&argc, argv);
benchmark::RunSpecifiedBenchmarks();
benchmark::Shutdown();
return 0;
}
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