[issue17338] Add length_hint parameter to list, dict, set constructors to allow efficient presizing

[Christian Heimes]

Christian Heimes added the comment:

My python-ideas posting about the same topic http://mail.python.org/pipermail/python-ideas/2013-March/019807.html

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Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue17338>
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