1 #include "benchmark/benchmark.h" 2 #include "test_macros.h" 3 4 #include <sstream> 5 6 TEST_NOINLINE double istream_numbers(); 7 8 double istream_numbers() { 9 const char *a[] = { 10 "-6 69 -71 2.4882e-02 -100 101 -2.00005 5000000 -50000000", 11 "-25 71 7 -9.3262e+01 -100 101 -2.00005 5000000 -50000000", 12 "-14 53 46 -6.7026e-02 -100 101 -2.00005 5000000 -50000000" 13 }; 14 15 int a1, a2, a3, a4, a5, a6, a7; 16 double f1 = 0.0, f2 = 0.0, q = 0.0; 17 for (int i=0; i < 3; i++) { 18 std::istringstream s(a[i]); 19 s >> a1 20 >> a2 21 >> a3 22 >> f1 23 >> a4 24 >> a5 25 >> f2 26 >> a6 27 >> a7; 28 q += (a1 + a2 + a3 + a4 + a5 + a6 + a7 + f1 + f2)/1000000; 29 } 30 return q; 31 } 32 33 static void BM_Istream_numbers(benchmark::State &state) { 34 double i = 0; 35 while (state.KeepRunning()) 36 benchmark::DoNotOptimize(i += istream_numbers()); 37 } 38 39 BENCHMARK(BM_Istream_numbers)->RangeMultiplier(2)->Range(1024, 4096); 40 BENCHMARK_MAIN(); 41
