google_benchmark.stack.cpp

#include <DynamicInterface.hpp>
#include <CRTPInterface.hpp>
#include <benchmark/benchmark.h>
#include <memory>

unsigned long N = 10000;
//auto dynobj = std::make_unique<DynamicImplementation>();
//auto crtpobj = std::make_unique<CRTPImplementation>();
DynamicImplementation dynobj;
CRTPImplementation crtpobj;

void run_dynamic(DynamicInterface* obj) {
	for (unsigned long i = 0; i < N; ++i) {
	  for (unsigned long j = 0; j < i; ++j) {
		  obj->tick(j);
	  }
	}
}

template <typename Implementation>
void run_crtp(CRTPInterface<Implementation>* obj) {
	for (unsigned long i = 0; i < N; ++i) {
		for (unsigned long j = 0; j < i; ++j) {
			obj->tick(j);
		}
	}
}

static void BM_DynamicInterface(benchmark::State& state)
{
	while (state.KeepRunning())
	{
		run_dynamic(&dynobj);
	}
}

BENCHMARK(BM_DynamicInterface);

static void BM_CRTPInterface(benchmark::State& state)
{
	while (state.KeepRunning())
	{
		run_crtp(&crtpobj);
	}
}

BENCHMARK(BM_CRTPInterface);

BENCHMARK_MAIN();

output.log

[[email protected] benchmark]$ g++ -O3 -std=c++14 benchmark_google.cpp -lbenchmark -lpthread -I.
[[email protected] benchmark]$ ./a.out
Run on (4 X 1217.33 MHz CPU s)
2016-04-01 21:20:36
***WARNING*** CPU scaling is enabled, the benchmark real time measurements may be noisy and will incur extra overhead.
Benchmark             Time(ns)    CPU(ns) Iterations
----------------------------------------------------
BM_DynamicInterface   12017047   12016833         42                                 
BM_CRTPInterface      12024512   12024316         57