Re: [PATCH 0/7] block-sha1: improved SHA1 hashing

From: Artur Skawina <art.08.09@gmail.com>
Date: Aug 6, 2009, 17:22 UTC
Message-ID: <4A7B1166.8020507@gmail.com>
In-Reply-To: <alpine.LFD.2.01.0908060803140.3390@localhost.localdomain>

Linus Torvalds wrote:

Show 7 quoted lines

> where the thing is loosely based on the Mozilla SHA1 routines but by the 
> end doesn't really resemble them all that much. The Mozilla ones suck 
> donkey d*ck in so many ways - unnecessary copies, idiotic byte-at-a-time 
> build-up of the hash input etc.
> 
> The end result is pretty much equivalent in performance to the OpenSSL 
> SHA1 code for me on x86-64. Getting rid of OpenSSL gets rid of another

For those curious just how close the C version is to the various asm and C implementations, the q&d microbenchmark is at http://www.src.multimo.pl/YDpqIo7Li27O0L0h/sha1bench.tar.gz

In short: 88% of openssl speed on P3, 42% on P4, 66% on Atom.

artur

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