speed up edge feature graph crf psi a lot.
speed up edge feature graph crf psi a lot.

wattlebird/pystruct,wattlebird/pystruct,d-mittal/pystruct,massmutual/pystruct,pystruct/pystruct,amueller/pystruct,d-mittal/pystruct,pystruct/pystruct,massmutual/pystruct,amueller/pystruct