libcxx/benchmarks/algorithms/min.bench.cpp

   1 #include <algorithm>
   2 #include <cassert>
   3
   4 #include <benchmark/benchmark.h>
   5
   6 void run_sizes(auto benchmark) {
   7   benchmark->Arg(1)
   8       ->Arg(2)
   9       ->Arg(3)
  10       ->Arg(4)
  11       ->Arg(5)
  12       ->Arg(6)
  13       ->Arg(7)
  14       ->Arg(8)
  15       ->Arg(9)
  16       ->Arg(10)
  17       ->Arg(11)
  18       ->Arg(12)
  19       ->Arg(13)
  20       ->Arg(14)
  21       ->Arg(15)
  22       ->Arg(16)
  23       ->Arg(17)
  24       ->Arg(18)
  25       ->Arg(19)
  26       ->Arg(20)
  27       ->Arg(21)
  28       ->Arg(22)
  29       ->Arg(23)
  30       ->Arg(24)
  31       ->Arg(25)
  32       ->Arg(26)
  33       ->Arg(27)
  34       ->Arg(28)
  35       ->Arg(29)
  36       ->Arg(30)
  37       ->Arg(31)
  38       ->Arg(32)
  39       ->Arg(64)
  40       ->Arg(512)
  41       ->Arg(1024)
  42       ->Arg(4000)
  43       ->Arg(4096)
  44       ->Arg(5500)
  45       ->Arg(64000)
  46       ->Arg(65536)
  47       ->Arg(70000);
  48 }
  49
  50 template <class T>
  51 static void BM_std_min(benchmark::State& state) {
  52   std::vector<T> vec(state.range(), 3);
  53
  54   for (auto _ : state) {
  55     benchmark::DoNotOptimize(vec);
  56     benchmark::DoNotOptimize(std::ranges::min(vec));
  57   }
  58 }
  59 BENCHMARK(BM_std_min<char>)->Apply(run_sizes);
  60 BENCHMARK(BM_std_min<short>)->Apply(run_sizes);
  61 BENCHMARK(BM_std_min<int>)->Apply(run_sizes);
  62 BENCHMARK(BM_std_min<long long>)->Apply(run_sizes);
  63 BENCHMARK(BM_std_min<__int128>)->Apply(run_sizes);
  64 BENCHMARK(BM_std_min<unsigned char>)->Apply(run_sizes);
  65 BENCHMARK(BM_std_min<unsigned short>)->Apply(run_sizes);
  66 BENCHMARK(BM_std_min<unsigned int>)->Apply(run_sizes);
  67 BENCHMARK(BM_std_min<unsigned long long>)->Apply(run_sizes);
  68 BENCHMARK(BM_std_min<unsigned __int128>)->Apply(run_sizes);
  69
  70 BENCHMARK_MAIN();