[issue17720] pickle.py's load_appends should call append() on objects other than lists

[Serhiy Storchaka]

Serhiy Storchaka added the comment:

Yes, test is needed. Current tests don't cover this case.

I suggest to move obj.append out of the tight loop, as in C implementation.

            append = obj.append
            for item in items:
                append(item)

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Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue17720>
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