[Developers] inv problems.
dseiple84 at gmail.com
Thu May 19 13:36:37 PDT 2011
Yes, I have made some improvements, but it is not yet back to the
speed that 9.1 had. I am going to make one more change to the code and
then see where we are. Once I've made the change and tested it I'll
On Thu, May 19, 2011 at 3:13 PM, John Sibert <sibert at hawaii.edu> wrote:
> I seem to recall a recent message from Derek implying that he had fixed the
> speed issue.
> 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
>> 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.
>> On Thu, 19 May 2011, dave fournier wrote:
>>> I'm a bit woried about these problmes with inv and maybe solve taking so
>>> 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?
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>> Developers at admb-project.org
> John Sibert
> Emeritus Researcher, SOEST
> University of Hawaii at Manoa
> Visit the ADMB project http://admb-project.org/
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