[issue2690] Precompute range length

[Nick Coghlan]

Nick Coghlan <ncoghlan at gmail.com> added the comment:

I'd still like to have another look at this before beta 1, but can't promise I'll get to it. Unassigning in case someone else has some roundtuits to spare over the next few weeks.

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assignee: ncoghlan -> 

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Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue2690>
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