[issue28199] Compact dict resizing is doing too much work

[INADA Naoki]

INADA Naoki added the comment:

> We can still clean this up for Python 3.6.  We're in feature freeze, not development freeze.

Does it mean there is a chance to improve OrderedDict to use new dict implementation, if it seems safe enough?
Is new implementation a feature?

(After OrderedDict implementation is improved, functools.lru_cache can use OrderedDict and remove doubly linked list too.)

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<http://bugs.python.org/issue28199>
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