let _ =
  NCicTypeChecker.set_logger 
    (function 
    | `Start_type_checking s -> ()
(*        prerr_endline ("Start: " ^ NUri.string_of_uri s) *)
    | `Type_checking_completed s ->  ()
(*        prerr_endline ("End: " ^ NUri.string_of_uri s) *)
       );
  NCicPp.set_ppterm NCicPp.trivial_pp_term;
  Helm_registry.load_from "conf.xml";
  let alluris = 
    try
      let s = Sys.argv.(1) in
      if s = "-alluris" then
       begin
        let uri_re = Str.regexp ".*\\(ind\\|var\\|con\\)$" in
        let uris = Http_getter.getalluris () in
        let alluris = List.filter (fun u -> Str.string_match uri_re u 0) uris in
        let oc = open_out "alluris.txt" in
        List.iter (fun s -> output_string oc (s^"\n")) alluris;
        close_out oc; 
        []
       end
      else [s]
    with Invalid_argument _ -> 
      let r = ref [] in
      let ic = open_in "alluris.txt" in
      try while true do r := input_line ic :: !r; done; []
      with _ -> List.rev !r
  in
  let alluris = 
    HExtlib.filter_map
      (fun u -> try Some (NUri.nuri_of_ouri (UriManager.uri_of_string u)) with _
      -> None) alluris 
  in
  prerr_endline "caching objects";
  List.iter (fun uu ->
(*     prerr_endline ("************* INIZIO **************** " ^ NUri.string_of_uri uu); *)
    let _,o = NCicEnvironment.get_obj uu in
    try 
      NCicTypeChecker.typecheck_obj o;
(*       prerr_endline ("************* FINE ****************" ^ NUri.string_of_uri uu); *)
    with 
    | NCicTypeChecker.AssertFailure s 
    | NCicTypeChecker.TypeCheckerFailure s as e -> 
(*        prerr_endline ("Obj: " ^ NCicPp.ppobj o); *)
       prerr_endline (Lazy.force s); raise e
    | CicEnvironment.Object_not_found s -> 
                    prerr_endline ("Obj not found: " ^ UriManager.string_of_uri s);
    )
    alluris;
  NCicEnvironment.invalidate ();
  Gc.compact ();
  prerr_endline "typechecking, first with the new and then with the old kernel";
  let prima = Unix.gettimeofday () in
  List.iter 
    (fun u -> NCicTypeChecker.typecheck_obj (snd (NCicEnvironment.get_obj u)))
    alluris;
  let dopo = Unix.gettimeofday () in
  Gc.compact ();
  let dopo2 = Unix.gettimeofday () in
  Printf.eprintf "NEW typing: %3.2f, gc: %3.2f\n%!" (dopo -. prima) (dopo2 -.  dopo);
  CicEnvironment.invalidate ();
  let alluris = List.map NUri.ouri_of_nuri alluris in
  Gc.compact ();
  let prima = Unix.gettimeofday () in
  List.iter (fun u -> ignore (CicTypeChecker.typecheck u)) alluris;
  let dopo = Unix.gettimeofday () in
  Gc.compact ();
  let dopo2 = Unix.gettimeofday () in
  Printf.eprintf "OLD typing: %3.2f, gc: %3.2f\n%!" (dopo -. prima) (dopo2 -. dopo)
;;