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