[Developers] inv problems.

[John Sibert]

I seem to recall a recent message from Derek implying that he had fixed 
the speed issue.
John

On 05/19/2011 08:02 AM, Arni Magnusson wrote:
> Hi Dave,
>
> I notice that I'm the only recipient of this important question. I 
> appreciate your faith in me, but efficient linear algebra with AD 
> objects is really outside my area of expertise.
>
> I haven't looked at the inverse or solve code (old, new, or proposed), 
> but posted the GCC profile diagnostics to help the development team to 
> improve the performance of the 'vol' example, which became 3 times 
> slower between 9.1 and 10.0. The profile diagnostics point at some 
> culprit functions, and Derek Seiple told me (25 Apr email) that he is 
> currently following those leads.
>
> This is definitely a high-priority issue. Given the nature of the 
> problem (we have 9.1 code that works fast) and the upcoming developer 
> workshop, I'm optimistic it will be solved in version 10.2 or 11.0.
>
> Cheers,
>
> Arni
>
>
>
> On Thu, 19 May 2011, dave fournier wrote:
>
>> Hi,
>>
>> I'm a bit woried about these problmes with inv and maybe solve taking 
>> so long.
>>
>> It kind of breaks the entire software. That is what I alway expected 
>> to happen eventually.  The idea is that it is supposed to be fast. I 
>> produced a sketch of the code proper working code but it seems to 
>> have been screwed up. Any thoughts?
>>
>> Dave
>>
> _______________________________________________
> Developers mailing list
> Developers at admb-project.org
> http://lists.admb-project.org/mailman/listinfo/developers
>

-- 
John Sibert
Emeritus Researcher, SOEST
University of Hawaii at Manoa

Visit the ADMB project http://admb-project.org/