phc-discussions - Re: [PHC] Dumb fast file digest idea...

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Message-ID: <CAOLP8p4e=A=suMfqdz=JBkSx3vPYpQMGAuCTEWFYObmQ=Ptu4Q@mail.gmail.com>
Date: Thu, 24 Apr 2014 07:15:24 -0400
From: Bill Cox <waywardgeek@...il.com>
To: discussions@...sword-hashing.net
Subject: Re: [PHC] Dumb fast file digest idea...

On Wed, Apr 23, 2014 at 5:48 PM, Bill Cox I coded this for fun, based on
Lyra2's modified version of Blake2b.  I'm not confident it's secure, but it
does run fast.  It hashes files almost 3.5 GB/s, or just over 1 byte per
clock.  Here's some speed comparisons:
>
>
> wghash (as I'm calling this hack): 3.48 GB/s
> md5sum: 0.72 GB/s
> sha256sum: 0.29 GB/s
>

Running 4 threads in parallel maxes out my memory bandwidth, doing 12.5
GB/s (note: GB, not GiB).  It verified 2GB in around 0.18 seconds.

Bill

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