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77 rader
2.3 KiB
77 rader
2.3 KiB
#include <chrono>
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#include <thread>
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#include "benchmark/benchmark.h"
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#if defined(NDEBUG)
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#undef NDEBUG
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#endif
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#include <cassert>
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void BM_basic(benchmark::State& state) {
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for (auto _ : state) {
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}
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}
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void BM_basic_slow(benchmark::State& state) {
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std::chrono::milliseconds sleep_duration(state.range(0));
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for (auto _ : state) {
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std::this_thread::sleep_for(
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std::chrono::duration_cast<std::chrono::nanoseconds>(sleep_duration));
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}
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}
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BENCHMARK(BM_basic);
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BENCHMARK(BM_basic)->Arg(42);
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BENCHMARK(BM_basic_slow)->Arg(10)->Unit(benchmark::kNanosecond);
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BENCHMARK(BM_basic_slow)->Arg(100)->Unit(benchmark::kMicrosecond);
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BENCHMARK(BM_basic_slow)->Arg(1000)->Unit(benchmark::kMillisecond);
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BENCHMARK(BM_basic_slow)->Arg(1000)->Unit(benchmark::kSecond);
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BENCHMARK(BM_basic)->Range(1, 8);
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BENCHMARK(BM_basic)->RangeMultiplier(2)->Range(1, 8);
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BENCHMARK(BM_basic)->DenseRange(10, 15);
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BENCHMARK(BM_basic)->Args({42, 42});
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BENCHMARK(BM_basic)->Ranges({{64, 512}, {64, 512}});
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BENCHMARK(BM_basic)->MinTime(0.7);
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BENCHMARK(BM_basic)->MinWarmUpTime(0.8);
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BENCHMARK(BM_basic)->MinTime(0.1)->MinWarmUpTime(0.2);
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BENCHMARK(BM_basic)->UseRealTime();
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BENCHMARK(BM_basic)->ThreadRange(2, 4);
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BENCHMARK(BM_basic)->ThreadPerCpu();
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BENCHMARK(BM_basic)->Repetitions(3);
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BENCHMARK(BM_basic)
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->RangeMultiplier(std::numeric_limits<int>::max())
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->Range(std::numeric_limits<int64_t>::min(),
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std::numeric_limits<int64_t>::max());
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// Negative ranges
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BENCHMARK(BM_basic)->Range(-64, -1);
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BENCHMARK(BM_basic)->RangeMultiplier(4)->Range(-8, 8);
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BENCHMARK(BM_basic)->DenseRange(-2, 2, 1);
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BENCHMARK(BM_basic)->Ranges({{-64, 1}, {-8, -1}});
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void CustomArgs(benchmark::internal::Benchmark* b) {
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for (int i = 0; i < 10; ++i) {
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b->Arg(i);
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}
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}
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BENCHMARK(BM_basic)->Apply(CustomArgs);
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void BM_explicit_iteration_count(benchmark::State& state) {
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// Test that benchmarks specified with an explicit iteration count are
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// only run once.
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static bool invoked_before = false;
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assert(!invoked_before);
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invoked_before = true;
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// Test that the requested iteration count is respected.
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assert(state.max_iterations == 42);
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for (auto _ : state) {
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}
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assert(state.iterations() == state.max_iterations);
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assert(state.iterations() == 42);
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}
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BENCHMARK(BM_explicit_iteration_count)->Iterations(42);
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BENCHMARK_MAIN();
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