[Python-Dev] Compact ordered dict is not ordered for split table. (was: PEP XXX: Compact ordered dict

INADA Naoki songofacandy at gmail.com
Sun Jun 26 07:25:36 EDT 2016

>> Another idea (though it has several issues and seems like a step backward):
>> a split-table dict can have a separate iteration list, indexing into the
>> entry table. There are ways to share iteration lists, and make it so that
>> adding the same keys in the same order each time results in the same
>> iteration list each time, but this costs overhead. There might be ways of
>> reducing the overhead, or the overhead might be replacing bigger overhead,
>> but we should decide if the behavior is what we want in the first place.
> I'll test some ideas.
> But for now, I'll update http://bugs.python.org/issue27350 to stop key
> sharing when
> order is different.  (a. deletion is not allowed, and insertion order
> must be same).
> It may reduce key sharing rate, but total memory usage must not increase so
> much thanks to compact dict.

I did it.  issue27350 is now ordered for key sharing dict, too.

INADA Naoki  <songofacandy at gmail.com>

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