let table = Hashtbl.create 103

let summary fmt =
  Logger.start_msg fmt "[Stats] Function profiling:";
  Logger.msg fmt "@\n     @[<v 0>";
  Hashtbl.iter (fun (m, f) d  ->
    let c, tl = !d in
    let tspent =
      List.fold_left (fun acc e -> e +. acc) 0. tl 
    in
    Logger.msg fmt "%s: %s = called %i times, total: %fms, average: %fms@\n"
      m f c tspent (tspent /. (float_of_int c))) table;
  Logger.end_msg Format.err_formatter "\n\n"