anchor.diff:  
   %% incremental clone detection.
   inc_sim_code_detection(Files, Thresholds, Tabs, SearchPaths, TabWidth) ->
  -    
  -    Time1 = time(),
  -    
  +   
  +    %%Time1 = time(),
       %% get file status change info.
       {FilesDeleted, FilesChanged, NewFiles} = get_file_status_info(Files, Tabs),
       
  
positive.code: 			   SubStr <- [lists:sublist(IndexStr, S, E - S + 1)]]),
      Cs2 = refac_code_search_utils:remove_sub_clones([{R, Len, Freq} || {R, {Len, Freq}} <- Cs1]),
      NewData = lists:append([F(Elem) || Elem <- Data]),
      %%refac_io:format("Cs from suffixtree:\n~p\n",[NewData]),
      get_clones_in_ranges([{R, {Len, Freq}} || {R, Len, Freq} <- Cs2],
  			 NewData, MinLen, MinToks, MinFreq).
     
  
negative.code:     Cs2 = examine_clone_candidates(Cs, Thresholds, Tabs, CloneCheckerPid, 1),
      stop_clone_check_process(CloneCheckerPid),
      stop_ast_process(ASTPid),
      Cs3 = combine_clones_by_au(Cs2),
      %%Time2 = time(),
      refac_code_search_utils:display_clone_result(Cs3, "Similar"),
      ?debug("Time used: \n~p\n", [{Time1, Time2}]).
      
  %% Get files that are deleted/changed/newly added since the last 
  %% run of the clone detection.
  