gtsam/geometry/tests/timeCalibratedCamera.cpp

/**
 * @file    timeCalibratedCamera.cpp
 * @brief   time CalibratedCamera derivatives
 * @author  Frank Dellaert
 */

#include <time.h>
#include <iostream>

#include <gtsam/geometry/CalibratedCamera.h>

using namespace std;
using namespace gtsam;

int main()
{
	int n = 100000;

	const Pose3 pose1(Matrix_(3,3,
			1., 0., 0.,
			0.,-1., 0.,
			0., 0.,-1.
	),
	Point3(0,0,0.5));

	const CalibratedCamera camera(pose1);
	const Point3 point1(-0.08,-0.08, 0.0);

	/**
	 * NOTE: because we only have combined derivative functions now,
	 * parts of this test are no longer useful.
	 */

	// Aug 8, iMac 3.06GHz Core i3
	//  378870 calls/second
	//  2.63943 musecs/call
	// AFTER collapse:
	//  1.57399e+06 calls/second
	//  0.63533 musecs/call
//	{
//		Matrix computed;
//		long timeLog = clock();
//		for(int i = 0; i < n; i++)
//			computed = Dproject_pose(camera, point1);
//		long timeLog2 = clock();
//		double seconds = (double)(timeLog2-timeLog)/CLOCKS_PER_SEC;
//		cout << ((double)n/seconds) << " calls/second" << endl;
//		cout << ((double)seconds*1000000/n) << " musecs/call" << endl;
//	}

	// Aug 8, iMac 3.06GHz Core i3
	// AFTER collapse:
	//  1.55383e+06 calls/second
	//  0.64357 musecs/call
//	{
//		Matrix computed;
//		long timeLog = clock();
//		for(int i = 0; i < n; i++)
//			computed = Dproject_point(camera, point1);
//		long timeLog2 = clock();
//		double seconds = (double)(timeLog2-timeLog)/CLOCKS_PER_SEC;
//		cout << ((double)n/seconds) << " calls/second" << endl;
//		cout << ((double)seconds*1000000/n) << " musecs/call" << endl;
//	}

	// Aug 8, iMac 3.06GHz Core i3
	//  371153 calls/second
	//  2.69431 musecs/call
	// AFTER collapse:
	//  1.10733e+06 calls/second
	//  0.90307 musecs/call
	{
		Matrix computed1, computed2;
		long timeLog = clock();
		for(int i = 0; i < n; i++)
			camera.project(point1, computed1, computed2);
		long timeLog2 = clock();
		double seconds = (double)(timeLog2-timeLog)/CLOCKS_PER_SEC;
		cout << ((double)n/seconds) << " calls/second" << endl;
		cout << ((double)seconds*1000000/n) << " musecs/call" << endl;
	}

	return 0;
}