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Message-ID: <20150920045858.GA2833@openwall.com>
Date: Sun, 20 Sep 2015 07:58:58 +0300
From: Solar Designer <solar@...nwall.com>
To: john-dev@...ts.openwall.com
Subject: Re: current large hash file speeds and bottlenecks (was: ldr_split_line() performance regression)
On Sun, Sep 20, 2015 at 07:46:14AM +0300, Solar Designer wrote:
> Here's further speedup for --show:
>
> real 0m12.012s
> user 0m11.607s
> sys 0m0.449s
And even further:
real 0m11.524s
user 0m11.169s
sys 0m0.450s
Change this line:
hash <<= 3; extra <<= 2;
to:
hash <<= 1; extra <<= 1;
and this line:
extra ^= extra >> CRACKED_HASH_LOG;
to:
extra ^= extra >> (CRACKED_HASH_LOG - 1);
Sorry I was too quick to post the previous patch, only to realize that
typical hash encodings are long enough that we don't need to shift
quicker to achieve the full hash size.
Alexander
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