Date: Sun, 31 May 2015 06:20:47 +0300 From: Solar Designer <solar@...nwall.com> To: john-dev@...ts.openwall.com Subject: Re: bitslice SHA-256 Hi Alain, On Sat, May 30, 2015 at 11:06:05PM -0400, Alain Espinosa wrote: > Just done. Attached new version of code. Included is hand-crafted Microsoft MASM assembler code for bitslice AVX2 sha256. Benchmark configuration is Windows 8.1, Visual Studio 2013, Core i5-4670 3.4GHz, only one thread. Performance is given in millions of keys per second: > > - 23.7 : Normal SHA256 implemented with hand-crafted AVX2 assembly > - 19.5 : Bitslice SHA256 implemented with hand-crafted AVX2 assembly (22% slower than normal, 56% faster than intrinsics) > - 12.5 : Bitslice SHA256 implemented with AVX2 intrinsics > > To give an idea of how this may traduce into real-world cracking speed, Hash Suite 3.3 cracks Raw-SHA256 at 24.8M. I don't understand: why is Hash Suite 3.3's speed slightly higher than the 23.7M you mentioned above? If it's for 4 cores vs. 1 core, then why is so much overhead incurred (almost 4x)? Thanks, Alexander
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