[issue15573] Support unknown formats in memoryview comparisons

[Nick Coghlan]

Nick Coghlan added the comment:

Perhaps the hash could just be based on a subset of the items? For example, hash the format, shape and the first and last items?

Yes, such an approach means you're more likely to get collisions if you do start hashing these, but that seems better than making hashing itself excessively slow.

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Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue15573>
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