minor cleanup, use set for efficient name lookup
minor cleanup, use set for efficient name lookup

dahebolangkuan/cython,encukou/cython,fperez/cython,achernet/cython,da-woods/cython,c-blake/cython,fperez/cython,acrispin/cython,mcanthony/cython,scoder/cython,c-blake/cython,slonik-az/cython,cython/cython,acrispin/cython,achernet/cython,madjar/cython,marscher/cython,encukou/cython,madjar/cython,achernet/cython,mrGeen/cython,acrispin/cython,andreasvc/cython,dahebolangkuan/cython,acrispin/cython,hhsprings/cython,JelleZijlstra/cython,mcanthony/cython,madjar/cython,mrGeen/cython,hhsprings/cython,fperez/cython,slonik-az/cython,hickford/cython,madjar/cython,marscher/cython,ChristopherHogan/cython,cython/cython,andreasvc/cython,hhsprings/cython,da-woods/cython,JelleZijlstra/cython,hickford/cython,acrispin/cython,andreasvc/cython,mrGeen/cython,mrGeen/cython,c-blake/cython,hhsprings/cython,marscher/cython,mcanthony/cython,ABcDexter/cython,scoder/cython,ABcDexter/cython,mcanthony/cython,da-woods/cython,andreasvc/cython,JelleZijlstra/cython,fperez/cython,encukou/cython,c-blake/cython,dahebolangkuan/cython,encukou/cython,achernet/cython,ABcDexter/cython,roxyboy/cython,slonik-az/cython,mrGeen/cython,fperez/cython,ChristopherHogan/cython,scoder/cython,andreasvc/cython,cython/cython,dahebolangkuan/cython,encukou/cython,dahebolangkuan/cython,ABcDexter/cython,slonik-az/cython,cython/cython,JelleZijlstra/cython,fabianrost84/cython,ChristopherHogan/cython,slonik-az/cython,marscher/cython,roxyboy/cython,scoder/cython,ABcDexter/cython,roxyboy/cython,hickford/cython,da-woods/cython,achernet/cython,roxyboy/cython,madjar/cython,roxyboy/cython,fabianrost84/cython,c-blake/cython,hhsprings/cython,JelleZijlstra/cython,fabianrost84/cython,hickford/cython,fabianrost84/cython,mcanthony/cython,hickford/cython,fabianrost84/cython,marscher/cython