faster 'find_models', using hashtbl.mem instead of ModelSet.mem
faster 'find_models', using hashtbl.mem instead of ModelSet.mem

touist/touist,olzd/touist,FredMaris/touist,touist/touist,touist/touist,olzd/touist,FredMaris/touist,touist/touist,olzd/touist,FredMaris/touist