STINNER Victor added the comment:

> Python 2.7 is closed for adding new features. Python 3.4+ uses different code 
> for calculating hashes.

The code doesn't modify the hash function. It's a common loop unroll 
optimization technique.

Since the optimization can be seen on real world benchmark, I think that it's 
worth to take this optimization.

----------
nosy: +haypo
type: enhancement -> performance

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Python tracker <rep...@bugs.python.org>
<http://bugs.python.org/issue25106>
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