'tree of depth 8 + TREE_FACTOR with 3 children per node'

def _setup_tree3(self, text, attributes):

    SubElement = self.etree.SubElement
    current_time = time.time
    t = current_time()
    root = self.etree.Element('{abc}rootnode')
    children = [root]
    for i in range((6 + TREE_FACTOR)):
        children = [SubElement(c, ('{cdefg}a%05d' % (i % 8)), attributes) for (i, c) in enumerate(chain(children, children, children))]
    for child in children:
        child.text = text
        child.tail = text
    t = (current_time() - t)
    return (root, t)
