Jack O'Connor <oconnor...@gmail.com> added the comment:

> Truncated sha512 (sha512-256) typically performs 40% faster than sha256 on 
> X86_64.

Without hardware acceleration, yes. But because SHA-NI includes only SHA-1 and 
SHA-256, and not SHA-512, it's no longer a level playing field. OpenSSL's 
SHA-512 and SHA-512/256 both get about 797 MB/s on my machine.

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Python tracker <rep...@bugs.python.org>
<https://bugs.python.org/issue39298>
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