Oh, while we're on the topic of optimizing assembly stuff...
dof_map.dof_indices() takes up a LARGE chunk of time as well.... and
closely behind that is the global_to_local mapping...
On these two we would LOVE to be able to get out _local_ dof_indices
(quickly)... and use the "local" form of ghosted vectors (so no
global_to_local map is necessary)...
Sorry to derail the conversation a bit... but if you start looking at the
profiling of libMesh assembly these 3 things kind of go together and make
up a significant chunk of runtime...
Derek
On Thu, Oct 25, 2012 at 12:34 PM, Roy Stogner <royst...@ices.utexas.edu>wrote:
>
>
> On Thu, 25 Oct 2012, Boyce Griffith wrote:
>
> > Is it even possible to have the shim class use operator[] for
> > multidimensional indexing ([i][j])? I don't know how you setup an
> equivalent
> > to "operator[][]". (Such a thing doesn't exist in C++, does it?)
>
> You make your operator[](i) return a temporary of a different class
> whose sole reason for existing is "store the number i, and return
> element (i,j) from my operator[](j)". It's not trivial to implement
> but it's actually not relatively far down the crazy-C++-idioms rabbit
> hole, and IIRC a half-decent compiler can still manage to inline it
> down to a zero-cost shim.
> ---
> Roy
>
>
> ------------------------------------------------------------------------------
> Everyone hates slow websites. So do we.
> Make your web apps faster with AppDynamics
> Download AppDynamics Lite for free today:
> http://p.sf.net/sfu/appdyn_sfd2d_oct
> _______________________________________________
> Libmesh-devel mailing list
> Libmesh-devel@lists.sourceforge.net
> https://lists.sourceforge.net/lists/listinfo/libmesh-devel
>
------------------------------------------------------------------------------
Everyone hates slow websites. So do we.
Make your web apps faster with AppDynamics
Download AppDynamics Lite for free today:
http://p.sf.net/sfu/appdyn_sfd2d_oct
_______________________________________________
Libmesh-devel mailing list
Libmesh-devel@lists.sourceforge.net
https://lists.sourceforge.net/lists/listinfo/libmesh-devel
