Cleanup mkMaps and avoid quadratic behaviour.
Cleanup mkMaps and avoid quadratic behaviour.

idontgetoutmuch/haddock,mrhania/haddock,Acidburn0zzz/haddock,mrBliss/haddock,JPMoresmau/haddock,Wizek/haddock,lamefun/haddock,Mistuke/haddock,adamse/haddock,sboosali/haddock,niteria/haddock,Wizek/haddock,Helkafen/haddock,mrBliss/haddock,haskell/haddock,esmolanka/haddock,Mistuke/haddock,haskell/haddock,Fuuzetsu/haddock,jgm/haddock,adamse/haddock,haskell/haddock,randen/haddock,esmolanka/haddock,Acidburn0zzz/haddock,idontgetoutmuch/haddock,Acidburn0zzz/haddock,sboosali/haddock,niteria/haddock,beni55/haddock,haskell/haddock,mrhania/haddock,JPMoresmau/haddock,Fuuzetsu/haddock,Wizek/haddock,niteria/haddock,beni55/haddock,JPMoresmau/haddock,beni55/haddock,idontgetoutmuch/haddock,mrhania/haddock,Helkafen/haddock,Fuuzetsu/haddock,jgm/haddock,mrBliss/haddock,Helkafen/haddock,haskell/haddock,sboosali/haddock,lamefun/haddock,jstolarek/haddock,lamefun/haddock,randen/haddock,adamse/haddock,Fuuzetsu/haddock,randen/haddock,Mistuke/haddock,esmolanka/haddock,jstolarek/haddock