Date: Fri, 8 Feb 2019 09:05:22 +0100 From: magnum <john.magnum@...hmail.com> To: john-users@...ts.openwall.com Subject: Re: Hyperscan regex 42x the performance of pcre On 2019-02-07 12:08, Stephen John Smoogen wrote: > On Thu, 7 Feb 2019 at 06:04, Jason Ellison <infotek@...il.com> wrote: >> After reading performance comparisons of various regex engines... hscan >> performs 42 times faster than pcre. I'm curious as to possible performance >> benefits of including Hyperscan into john. >> >> https://rust-leipzig.github.io/regex/2017/03/28/comparison-of-regex-engines/ >> >> https://www.hyperscan.io/ >> https://github.com/intel/hyperscan >> > > Is John sitting a long time in pcre? I mean if you are spending 80 > seconds making hashes and 1 second to regex and you cut it down to 0.1 > second.. does it help any? JtR doesn't have or use regexes at all, except when built with (currently experimental) regex-library but in that case all regex logic is in that external lib. Hyperscan sounds interesting though. Nothing stops us (well except manpower) from re-implementing regex mode with that instead. magnum
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