Add performance function test.
Add performance function test.

theranger/mlpack,stereomatchingkiss/mlpack,chenmoshushi/mlpack,ranjan1990/mlpack,ajjl/mlpack,bmswgnp/mlpack,palashahuja/mlpack,datachand/mlpack,thirdwing/mlpack,chenmoshushi/mlpack,minhpqn/mlpack,theranger/mlpack,stereomatchingkiss/mlpack,minhpqn/mlpack,theranger/mlpack,ranjan1990/mlpack,trungda/mlpack,thirdwing/mlpack,ajjl/mlpack,datachand/mlpack,thirdwing/mlpack,stereomatchingkiss/mlpack,BookChan/mlpack,bmswgnp/mlpack,datachand/mlpack,palashahuja/mlpack,lezorich/mlpack,BookChan/mlpack,chenmoshushi/mlpack,ersanliqiao/mlpack,erubboli/mlpack,ersanliqiao/mlpack,bmswgnp/mlpack,darcyliu/mlpack,ajjl/mlpack,trungda/mlpack,lezorich/mlpack,palashahuja/mlpack,trungda/mlpack,ranjan1990/mlpack,Azizou/mlpack,erubboli/mlpack,Azizou/mlpack,erubboli/mlpack,lezorich/mlpack,darcyliu/mlpack,darcyliu/mlpack,Azizou/mlpack,minhpqn/mlpack,ersanliqiao/mlpack,BookChan/mlpack