diff options
Diffstat (limited to 'benchmarks/stringstream.bench.cpp')
-rw-r--r-- | benchmarks/stringstream.bench.cpp | 38 |
1 files changed, 38 insertions, 0 deletions
diff --git a/benchmarks/stringstream.bench.cpp b/benchmarks/stringstream.bench.cpp new file mode 100644 index 000000000000..6023cf775bc8 --- /dev/null +++ b/benchmarks/stringstream.bench.cpp @@ -0,0 +1,38 @@ +#include "benchmark/benchmark_api.h" + +#include <sstream> +double __attribute__((noinline)) istream_numbers(); + +double istream_numbers() { + const char *a[] = { + "-6 69 -71 2.4882e-02 -100 101 -2.00005 5000000 -50000000", + "-25 71 7 -9.3262e+01 -100 101 -2.00005 5000000 -50000000", + "-14 53 46 -6.7026e-02 -100 101 -2.00005 5000000 -50000000" + }; + + int a1, a2, a3, a4, a5, a6, a7; + double f1 = 0.0, f2 = 0.0, q = 0.0; + for (int i=0; i < 3; i++) { + std::istringstream s(a[i]); + s >> a1 + >> a2 + >> a3 + >> f1 + >> a4 + >> a5 + >> f2 + >> a6 + >> a7; + q += (a1 + a2 + a3 + a4 + a5 + a6 + a7 + f1 + f2)/1000000; + } + return q; +} + +static void BM_Istream_numbers(benchmark::State &state) { + double i = 0; + while (state.KeepRunning()) + benchmark::DoNotOptimize(i += istream_numbers()); +} + +BENCHMARK(BM_Istream_numbers)->RangeMultiplier(2)->Range(1024, 4096); +BENCHMARK_MAIN() |