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
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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