anchor.diff:          {success_rate, ?SUCCESS_RATE},
           {parameters, [
               [{name, proc_num}, {value, 1}, {description, "Number of threads used during the test."}],
  -            [{name, dir_level}, {value, 100}, {description, "Level of test directory."}],
  -            [{name, dirs_num_per_proc}, {value, 100}, {description, "Number of dirs tested by single thread."}]
  +            [{name, dir_level}, {value, 10}, {description, "Level of test directory."}],
  +            [{name, dirs_num_per_proc}, {value, 10}, {description, "Number of dirs tested by single thread."}]
           ]},
           {description, "Tests performance of ls with gettin stats operation"},
           {config, [{name, low_level_single_thread_small_dir},
  
positive.code:             description = "Time of all stat operations"},
          #parameter{name = ls_stat_time, value = LsWithStatTime, unit = "us",
              description = "Total time of ls and all stat operations"}
      ],
  
      ct:print("~p", [{Ans}]),
      Ans.
  
  ls_test(Config) ->
      ?PERFORMANCE(Config, [
  
negative.code: 
      LsWithStatTime = LsTime + StatTime,
  
      [
          #parameter{name = create_tree_time, value = CreateTreeTime, unit = "us",
              description = "Time of test tree creation"},
          #parameter{name = create_dirs_time, value = CreateDirsTime, unit = "us",
  