9ad07054_Dana_Jacobsen__blogs_perl_org__Combinations_and_Permutations_Module
[Impl] XS [Comb] yes [Perm] yes [Comb w/rep] yes [Perm w/rep] yes [Derange] yes [Speed] + [Order] Lexico [Comments] Fast iterator or array [Module] 
Algorithm::Combinatorics
Dana Jacobsen [blogs.perl.org]
Module