Minor speedup.
Minor speedup.

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