anchor.diff:  %% TEST CASES: performance lookup b_tree order 9
   %%--------------------------------------------------------------------
   
  -performance_lookup_b_tree_order_9_test(Config) ->
  +lookup_b_tree_order_9_test(Config) ->
       BTree = ?config(btree_9, Config),
       Keys = ?config(keys, Config),
       lookup_b_tree(Keys, BTree),
  
positive.code: %% TEST CASES: performance insert b_tree order 17
  %%--------------------------------------------------------------------
  
  performance_insert_b_tree_order_17_test(_Config) ->
      BTree = test_generator:generate_b_tree_from_number(17, ?NUMBER_INSERTS, 4),
      ?assert(b_trees:height(BTree) =< int_ceil((math:log((?NUMBER_INSERTS + 1) / 2) / math:log(17 div 2)))).
  
  
negative.code: %% TEST CASES: performance values b_tree order 129
  %%--------------------------------------------------------------------
  
  values_b_tree_order_129_test(Config) ->
      BTree = ?config(btree_129, Config),
      Keys = b_trees:values(BTree),
      ?assertEqual(?NUMBER_INSERTS, length(Keys)),
  