started ar 0904, instead of the usual "much later" that was nice l::c contructs an object to compare two lists. $lc = L::C->new(\@x, \@y) $lc->intersection $lc->LsubsetR why compute all comparisons at once? accelleration mode why just two lists? multiple mode misleading-seeming _ref "speed up" changes interface of target w/o explanation List::Compare::Functional yay! non-oo interface dha suggested a new interface, which is also implemented takes a hashref of arguments