//?This?file?is?part?of?Eigen?a?lightweight?C++?template?library
//?for?linear?algebra.
//
//?Copyright?（C）?2013?Gauthier?Brun?
//?Copyright?（C）?2013?Nicolas?Carre?
//?Copyright?（C）?2013?Jean?Ceccato?
//?Copyright?（C）?2013?Pierre?Zoppitelli?
//
//?This?Source?Code?Form?is?subject?to?the?terms?of?the?Mozilla
//?Public?License?v.?2.0.?If?a?copy?of?the?MPL?was?not?distributed
//?with?this?file?You?can?obtain?one?at?http://mozilla.org/MPL/2.0/

//?Bench?to?compare?the?efficiency?of?SVD?algorithms

#include?
#include?
#include?


using?namespace?Eigen;
using?namespace?std;

//?number?of?computations?of?each?algorithm?before?the?print?of?the?time
#ifndef?REPEAT
#define?REPEAT?10
#endif

//?number?of?tests?of?the?same?type
#ifndef?NUMBER_SAMPLE
#define?NUMBER_SAMPLE?2
#endif

template
void?bench_svd（const?MatrixType&?a?=?MatrixType（））
{
??MatrixType?m?=?MatrixType::Random（a.rows（）?a.cols（））;
??BenchTimer?timerJacobi;
??BenchTimer?timerBDC;
??timerJacobi.reset（）;
??timerBDC.reset（）;

??cout?<??for?（int?k=1;?k<=NUMBER_SAMPLE;?++k）
??{
????timerBDC.start（）;
????for?（int?i=0;?i????{
??????BDCSVD?bdc_matrix（m）;
????}
????timerBDC.stop（）;
????
????timerJacobi.start（）;
????for?（int?i=0;?i????{
??????JacobiSVD?jacobi_matrix（m）;
????}
????timerJacobi.stop（）;


????cout?<????cout?<??????
????if?（timerBDC.value（）?>=?timerJacobi.value（））??
??????cout?<????else?
??????cout?<??????
??}
??cout?<??std::cout<??timerJacobi.reset（）;
??timerBDC.reset（）;
??cout?<??for?（int?k=1;?k<=NUMBER_SAMPLE;?++k）
??{
????timerBDC.start（）;
????for?（int?i=0;?i????{
??????BDCSVD?bdc_matrix（m?ComputeFullU|ComputeFullV）;
????}
????timerBDC.stop（）;
????
????timerJacobi.start（）;
????for?（int?i=0;?i????{
??????JacobiSVD?jacobi_matrix（m?ComputeFullU|ComputeFullV）;
????}
????timerJacobi.stop（）;


????cout?<????cout?<??????
????if?（timerBDC.value（）?>=?timerJacobi.value（））??
??????cout?<????else?
??????cout?<