Date: Mon, 31 Aug 2020 23:09:45 +0200 From: Vincent <spam@...lab.nl> To: john-users@...ts.openwall.com Subject: SIMD performance impact Hi, John can use instruction set specific optimizations to fully exploit technology like SIMD. I haven't got CPUs that support AVX-512 but I'm very interested in the possible performance gains. So my question is: can someone with the latest generation CPU run a 'john --test' with different instruction set binaries (for example SSE4.2, AVX, AVX2, AVX-512) on the same CPU? I think it might also be interesting to match current Intel (Core i9 & Xeon) and AMD (Ryzen & Epyc) processors to see what the impact of implementation details is (like Xeon AVX-512 versus Epyc AVX2). Perhaps interesting to upgrade <https://openwall.info/wiki/john/benchmarks> with all algorithms (since some do not seem to be SIMD-accelerated) and with results based on different instruction sets on the same CPU? Thanks! Cheers, V
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