featherkit_tests.cpp

#include <chrono>
#include <iostream>
#include <fea/util/noise.hpp>

int main()
{
	fea::Noise noise;

	uint64_t min(-1), max(0), avg(0);
	int steps = 10;

	for(int n=0; n < steps; ++n)
	{
		auto start = std::chrono::high_resolution_clock::now();

		for(unsigned int i=0; i < 100000000; ++i)
		{
			noise.simplexOctave3D(i*0.1f, i*2.f, i*3.f);
		}

		auto end = std::chrono::high_resolution_clock::now();

		uint64_t current = std::chrono::duration_cast<std::chrono::microseconds>(end-start).count();

		std::cout<<"Step: "<<current<<"us"<<std::endl;

		min = std::min(current, min);
		max = std::max(current, max);
		avg += current;
	}

	avg /= steps;

	std::cout<<"Times (min, max, avg): "<<min<<"us, "<<max<<"us, "<<avg<<"us"<<std::endl;
}

/*

Built on ArchLinux x86_64 with GCC 4.9.1
Featherkit-util linked as static library
CPU: Intel Core i7 4770 @ 3.4 GHz
(Tests were performed with TurboBoost on, and the clock speed was 3.75GHz)

NI marks "No Improvement"

Featherkit: C++ Noise:
	- Featherkit: Optimizations = -O3:
		- Benchmark: No optimizations:
			- min: 18598904us (18.59s)
			- max: 18811096us (18.81s)
			- avg: 18642994us (18.64s)
		- Benchmark: Optimizations = -O3:
			- min: 18225107us (18.22s)
			- max: 18428804us (18.42s)
			- avg: 18273183us (18.27s)
		- Benchmark: Optimizations = -O3 -msse4 -mfpmath=sse
			- min: 18220874us (18.22s) 
			- max: 18444949us (18.44s)
			- avg: 18268383us (18.26s)
		- Benchmark: Optimizations = -O3 -msse4 -mfpmath=sse -march=native
			- min: 18190438us (18.19s)
			- max: 18379250us (18.37s)
			- avg: 18269299us (18.26s)

	- Featherkit: Optimizations = -O3 -msse4 -mfpath=sse
		- Benchmark: No optimizations:
			- min: 18428852us (18.42s)
			- max: 18611255us (18.61s)
			- avg: 18491360us (18.49s)
		- Benchmark: Optimizations = -O3:
			- min: NI
			- max: NI
			- avg: NI
		- Benchmark: Optimizations = -O3 -msse4 -mfpmath=sse
			- min: NI
			- max: NI
			- avg: NI
		- Benchmark: Optimizations = -O3 -msse4 -mfpmath=sse -march=native
			- min: NI
			- max: NI
			- avg: NI

Featherkit: ASM Noise:
	- Featherkit: Optimizations = -O3:
		- Benchmark: No optimizations:
			- min: 17569558us (17.56s)
			- max: 18067037us (18.06s)
			- avg: 17710227us (17.71s)
		- Benchmark: Optimizations = -O3:
			- min: 17260683us (17.26s)
			- max: 17342005us (17.34s)
			- avg: 17283750us (17.28s)
		- Benchmark: Optimizations = -O3 -msse4 -mfpmath=sse
			- min: 17280764us (17.28s)
			- max: 17475024us (17.47s)
			- avg: 17357192us (17.35s)
		- Benchmark: Optimizations = -O3 -msse4 -mfpmath=sse -march=native
			- min: 17323757us (17.32s)
			- max: 17550231us (17.55s)
			- avg: 17378784us (17.37s)


*/