[Checkins] [zopefoundation/zope.interface] 17f508: Improve InterfaceClass __hash__ performance

[Jens W. Klein]

  Branch: refs/heads/hash_performance
  Home:   https://github.com/zopefoundation/zope.interface
  Commit: 17f50820d67ac4ab7d7cc79fbc15f5dd43a358cf
      https://github.com/zopefoundation/zope.interface/commit/17f50820d67ac4ab7d7cc79fbc15f5dd43a358cf
  Author: Jens W. Klein <jk at kleinundpartner.at>
  Date:   2020-01-24 (Fri, 24 Jan 2020)

  Changed paths:
    M CHANGES.rst
    M src/zope/interface/interface.py

  Log Message:
  -----------
  Improve InterfaceClass __hash__ performance