class RuboCop::Cop::Performance::CompareWithBlock

def on_block(node)
  compare?(node) do |send, var_a, var_b, body|
    replaceable_body?(body, var_a, var_b) do |method, args_a, args_b|
      return unless slow_compare?(method, args_a, args_b)
      range = compare_range(send, node)
      add_offense(node, range,
                  message(send, method, var_a, var_b, args_a))
    end
  end
end