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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 <benchmark/benchmark.h>
#include <cstring>
#include <deque>
#include <random>
#include <vector>
template <class Container>
static void bm_find(benchmark::State& state) {
using T = Container::value_type;
Container vec1(state.range(), '1');
std::mt19937_64 rng(std::random_device{}());
for (auto _ : state) {
auto idx = rng() % vec1.size();
vec1[idx] = '2';
benchmark::DoNotOptimize(vec1);
benchmark::DoNotOptimize(std::find(vec1.begin(), vec1.end(), T('2')));
vec1[idx] = '1';
}
}
BENCHMARK(bm_find<std::vector<char>>)->DenseRange(1, 8)->Range(16, 1 << 20);
BENCHMARK(bm_find<std::vector<short>>)->DenseRange(1, 8)->Range(16, 1 << 20);
BENCHMARK(bm_find<std::vector<int>>)->DenseRange(1, 8)->Range(16, 1 << 20);
BENCHMARK(bm_find<std::deque<char>>)->DenseRange(1, 8)->Range(16, 1 << 20);
BENCHMARK(bm_find<std::deque<short>>)->DenseRange(1, 8)->Range(16, 1 << 20);
BENCHMARK(bm_find<std::deque<int>>)->DenseRange(1, 8)->Range(16, 1 << 20);
template <class Container>
static void bm_ranges_find(benchmark::State& state) {
using T = Container::value_type;
Container vec1(state.range(), '1');
std::mt19937_64 rng(std::random_device{}());
for (auto _ : state) {
auto idx = rng() % vec1.size();
vec1[idx] = '2';
benchmark::DoNotOptimize(vec1);
benchmark::DoNotOptimize(std::ranges::find(vec1, T('2')));
vec1[idx] = '1';
}
}
BENCHMARK(bm_ranges_find<std::vector<char>>)->DenseRange(1, 8)->Range(16, 1 << 20);
BENCHMARK(bm_ranges_find<std::vector<short>>)->DenseRange(1, 8)->Range(16, 1 << 20);
BENCHMARK(bm_ranges_find<std::vector<int>>)->DenseRange(1, 8)->Range(16, 1 << 20);
BENCHMARK(bm_ranges_find<std::deque<char>>)->DenseRange(1, 8)->Range(16, 1 << 20);
BENCHMARK(bm_ranges_find<std::deque<short>>)->DenseRange(1, 8)->Range(16, 1 << 20);
BENCHMARK(bm_ranges_find<std::deque<int>>)->DenseRange(1, 8)->Range(16, 1 << 20);
static void bm_vector_bool_find(benchmark::State& state) {
std::vector<bool> vec1(state.range(), false);
std::mt19937_64 rng(std::random_device{}());
for (auto _ : state) {
auto idx = rng() % vec1.size();
vec1[idx] = true;
benchmark::DoNotOptimize(vec1);
benchmark::DoNotOptimize(std::find(vec1.begin(), vec1.end(), true));
vec1[idx] = false;
}
}
BENCHMARK(bm_vector_bool_find)->DenseRange(1, 8)->Range(16, 1 << 20);
static void bm_vector_bool_ranges_find(benchmark::State& state) {
std::vector<bool> vec1(state.range(), false);
std::mt19937_64 rng(std::random_device{}());
for (auto _ : state) {
auto idx = rng() % vec1.size();
vec1[idx] = true;
benchmark::DoNotOptimize(vec1);
benchmark::DoNotOptimize(std::ranges::find(vec1, true));
vec1[idx] = false;
}
}
BENCHMARK(bm_vector_bool_ranges_find)->DenseRange(1, 8)->Range(16, 1 << 20);
BENCHMARK_MAIN();
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