[issue29368] Optimize unpickling list-like objects: use extend() instead of append()

[Roundup Robot]

Roundup Robot added the comment:

New changeset 328147c0edc3 by Victor Stinner in branch 'default':
Issue #29368: Fix _Pickle_FastCall() usage in do_append()
https://hg.python.org/cpython/rev/328147c0edc3

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Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue29368>
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