type score = (string (* usually a filename *), score_result) Hashtbl.t
type score_list = (string (* usually a filename *) * score_result) list
val empty_score : unit -> score
+val load_score : string -> unit -> score
+val save_score : score -> string -> unit
val regression_testing :
score -> filename (* old score file on disk (usually in /tmp) *) -> unit
val regression_testing_vs: score -> score -> score