Re: [eigen] Eigen "views" |

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*To*: eigen@xxxxxxxxxxxxxxxxxxx
*Subject*: Re: [eigen] Eigen "views"
*From*: Jose Luis Blanco <joseluisblancoc@xxxxxxxxx>
*Date*: Tue, 16 Aug 2011 17:29:43 +0200
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On Tue, Aug 16, 2011 at 5:03 PM, Benoit Jacob <jacob.benoit.1@xxxxxxxxx> wrote:
> ...or rather, just the fact that each packet load would have to do 4
> (or 2) random memory accesses.
Exactly... that's why I think it would be more efficient to first
"lose" time arranging all the sparse coefficients together into a
temporary Matrix<> from the new class MyViewExpression<>, and then
operating with that dense matrix that would vectorize as usual.
But probably all is a matter of benchmarking and seeing the pros/cons
of using the temporary dense matrix for each situation.
JL