Attachment 695 Details for Bug 1181 – Test code

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Test code

main.cpp (text/plain), 1.07 KB, created by neumann on 2016-04-14 20:23:11 UTC

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Creator: neumann

Created: 2016-04-14 20:23:11 UTC

Size: 1.07 KB

patch

obsolete

>#include <iostream>
>#include <stdlib.h>
>#include <chrono>
>#include <Eigen/Core>
>
>
>int main(int argc, char** argv)
>{
>	using namespace Eigen;
>
>	Matrix3d tmp;
>	
>	Matrix3d tmp2;
>	tmp2 << 1, 2, 3,
>		4, 5, 6,
>		7, 8, 9;
>	
>	Vector3d yi;
>	yi << 2, 1, 9;
>
>
>	for (int i = 0; i < 10000000; ++i) //Just to get the CPU up to speed
>	{
>		yi << i + 1, -i + 2, i + 3;
>		tmp = yi*yi.transpose(); // <- This is slow 
>		tmp *= 2; 
>	}
>	tmp *= 2;
>
>	std::chrono::time_point<std::chrono::high_resolution_clock, std::chrono::nanoseconds> det_init_begin, det_init_finished;
>	det_init_begin = std::chrono::high_resolution_clock::now();
>
>	for (int i = 0; i < 10000000; ++i)
>	{
>		yi << i + 1, -i + 2, i + 3;
>		//tmp = tmp2*yi.asDiagonal(); // <-This is fast
>		tmp = yi*yi.transpose(); // <- This is slow 
>		tmp *= 2;
>	}
>	tmp *= 2;
>
>	det_init_finished = std::chrono::high_resolution_clock::now();
>	std::cout << "It took " << (det_init_finished - det_init_begin).count() / 1E7 << " ms to calc 10^7 values " << std::endl << std::endl;
>
>	system("Pause");
>	return EXIT_SUCCESS;
>}

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Attachments on bug 1181: 695