What are the Difference between cElementtree and ElementTree?

Question

I know a little of dom, and would like to learn about ElementTree. Python 2.6 has a somewhat older implementation of ElementTree, but still usable. However, it looks like it

Answer 1

But now they are the same thing as of Python 3.3, in github source code cElementTree

# cElementTree.py

from xml.etree.ElementTree import *

it is just for backward compatibility