libcxx/test/benchmarks/algorithms/count.bench.cpp

   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 <benchmark/benchmark.h>
  13 #include <cstring>
  14 #include <random>
  15 #include <vector>
  16
  17 static void bm_vector_bool_count(benchmark::State& state) {
  18   std::vector<bool> vec1(state.range(), false);
  19
  20   for (auto _ : state) {
  21     benchmark::DoNotOptimize(vec1);
  22     benchmark::DoNotOptimize(std::count(vec1.begin(), vec1.end(), true));
  23   }
  24 }
  25 BENCHMARK(bm_vector_bool_count)->DenseRange(1, 8)->Range(16, 1 << 20);
  26
  27 static void bm_vector_bool_ranges_count(benchmark::State& state) {
  28   std::vector<bool> vec1(state.range(), false);
  29
  30   for (auto _ : state) {
  31     benchmark::DoNotOptimize(vec1);
  32     benchmark::DoNotOptimize(std::ranges::count(vec1.begin(), vec1.end(), true));
  33   }
  34 }
  35 BENCHMARK(bm_vector_bool_ranges_count)->DenseRange(1, 8)->Range(16, 1 << 20);
  36
  37 BENCHMARK_MAIN();