[Haskell-cafe] Re: [darcs-devel] announcing darcs 2.0.0pre3

[Anatoly Yakovenko]

i would recommend just using the native one.  The best performance
that I was able to get with ghc 6.6 was still seven times slower then
the native sha1 implementation.

2008/1/23 Peter Verswyvelen <bf3 at telenet.be>:
>
>  Maybe a dedicated SIMD version of SHA1?
>
>  http://arctic.org/~dean/crypto/sha1.html
>
>  Cheers,
>  Peter
>
>
>  David Roundy wrote:
>  On Wed, Jan 23, 2008 at 03:26:51PM +0000, Simon Marlow wrote:
>
>
>  There are still times when I see nothing happening, for example in the
> unpull test on the GHC repo (see previous messages), the last progress
> message I get is
>
> Reading patches in /64playpen/simonmar/ghc-darcs2 17040
>
> and it sits there for 7-8 seconds before completing. Does this maybe shed
> any light on why this unpull is 2 times slower than darcs1?
>
>  I'm not entirely certain what's triggering this, but I have identified that
> removing a couple of sha1 checks cuts 1s out of 15s for me. This makes me
> wonder whether it's worth looking into a faster sha1 implementation.
>
>
>
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