[Python-Dev] The memo of pickle

[M.-A. Lemburg]

Martin v. Loewis wrote:
> pickle currently puts tuples into the memo on pickling, but only ever
> uses the position field ([0]), never the object itself ([1]).
> 
> I understand that the reference to the object is needed to keep it
> alive while pickling.
> 
> Unfortunately, this means one needs to allocate 36 bytes for the
> tuple.
> 
> I think this memory consumption could be reduced by saving the objects
> in a list, and only saving the position in the memo dictionary. That
> would save roughly 32 bytes per memoized object, assuming there is no
> malloc overhead.

While that may save you some bytes, wouldn't it break pickle
subclasses using the memo as well ?

-- 
Marc-Andre Lemburg
CEO eGenix.com Software GmbH
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