[issue19256] Optimize marshal format and add version token.

[Kristján Valur Jónsson]

Kristján Valur Jónsson added the comment:

Quoting myself: "for prudence."
We probably should have had this from the beginning.  Adding this now makes it easier to make such changes in future, because then you don't have to re-invent the versioning mechanism.

----------

_______________________________________
Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue19256>
_______________________________________