[issue3459] optimize bytes.join()

[Martin v. Löwis]

Martin v. Löwis <martin at v.loewis.de> added the comment:

I dislike this change, not because of the potential slowdown, but
because of the added code complexity.

How plausible is it that you want to join a list of bytes objects, and
the list has more than one item, yet all but one item are empty? If you
have such an application, and performance matters, you shouldn't add the
empty bytes to the list in the first place.

Tentatively rejecting the patch.

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resolution:  -> rejected
status: open -> pending

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<http://bugs.python.org/issue3459>
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