Make permutations(n) about 15x faster
Make permutations(n) about 15x faster

- by using the new R:It.Permutations iterator
- based on permutations(5)

labster/rakudo,softmoth/rakudo,softmoth/rakudo,softmoth/rakudo,rakudo/rakudo,Gnouc/rakudo,samcv/rakudo,nbrown/rakudo,awwaiid/rakudo,tbrowder/rakudo,labster/rakudo,samcv/rakudo,tbrowder/rakudo,samcv/rakudo,awwaiid/rakudo,tbrowder/rakudo,tbrowder/rakudo,tony-o/rakudo,sjn/rakudo,salortiz/rakudo,tony-o/rakudo,sjn/rakudo,nbrown/rakudo,MasterDuke17/rakudo,tony-o/rakudo,sjn/rakudo,rakudo/rakudo,usev6/rakudo,rakudo/rakudo,lucasbuchala/rakudo,Gnouc/rakudo,Gnouc/rakudo,usev6/rakudo,nbrown/rakudo,samcv/rakudo,salortiz/rakudo,jonathanstowe/rakudo,salortiz/rakudo,nbrown/rakudo,sjn/rakudo,MasterDuke17/rakudo,tbrowder/rakudo,Gnouc/rakudo,Gnouc/rakudo,awwaiid/rakudo,jonathanstowe/rakudo,usev6/rakudo,raydiak/rakudo,tony-o/rakudo,softmoth/rakudo,MasterDuke17/rakudo,rakudo/rakudo,MasterDuke17/rakudo,salortiz/rakudo,labster/rakudo,usev6/rakudo,awwaiid/rakudo,MasterDuke17/rakudo,nbrown/rakudo,lucasbuchala/rakudo,rakudo/rakudo,awwaiid/rakudo,labster/rakudo,tbrowder/rakudo,tony-o/rakudo,samcv/rakudo,softmoth/rakudo,labster/rakudo,raydiak/rakudo,MasterDuke17/rakudo,jonathanstowe/rakudo,lucasbuchala/rakudo,raydiak/rakudo,salortiz/rakudo,labster/rakudo,nbrown/rakudo,jonathanstowe/rakudo,lucasbuchala/rakudo,rakudo/rakudo,Gnouc/rakudo,tony-o/rakudo,lucasbuchala/rakudo,sjn/rakudo,salortiz/rakudo,usev6/rakudo,jonathanstowe/rakudo,raydiak/rakudo