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Date: Sun, 23 Sep 2012 18:16:26 +0200
From: magnum <john.magnum@...hmail.com>
To: john-dev@...ts.openwall.com
Subject: Re: O3 vs O2

On 23 Sep, 2012, at 17:57 , Dhiru Kholia <dhiru.kholia@...il.com> wrote:

> Hi,
> 
> Using O3 results in a huge performance boost for OpenVMS format.
> 
> ✗ ../run/john -fo:openvms -t # with O3
> Benchmarking: OpenVMS Purdy [32/64]... DONE
> Raw:	1186K c/s real, 1186K c/s virtual
> 
> ✗ ../run/john -fo:openvms -t # with O2
> Benchmarking: OpenVMS Purdy [32/64]... DONE
> Raw:	753030 c/s real, 753030 c/s virtual
> 
> Are there any known formats where using O3 results in lower performance?

I believe there is, but I can't recall the details (and things might have changed anyway). Maybe there is some way to improve the code instead?

magnum

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