We are happy that you wish to contribute; however, our policy is that performance enhancements only go in to the newest version of Python, which means any submitted patch must be against the 'default' branch of the Python mercurial repository.  If you wish to propose a patch against default, we will be happy to review it.  If you do not wish to do so, we will close the issue, and your patch will remain available here on the tracker to anyone who wishes to apply it by hand to their own Python 2.7 installation.