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- To: eigen@xxxxxxxxxxxxxxxxxxx
- Subject: Re: [eigen] Is post-multiplication by diagonal matrix optimized?
- From: Gael Guennebaud <gael.guennebaud@xxxxxxxxx>
- Date: Tue, 22 Jun 2010 09:55:15 +0200
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Hi,
yes it is. or at least it should be. so fell free to come back if you
think you have some perf issue.
gael
On Tue, Jun 22, 2010 at 1:17 AM, Manoj Rajagopalan <rmanoj@xxxxxxxxx> wrote:
> Hi,
>
> I've been told that premultiplication by a diagonal matrix is optimized by
> eigen:
>
> VectorXd v(N);
> MatrixXd M(N,N);
> v.asDiagonal() * M
>
> Is M * v.asDiagonal() also recognized and optimized?
>
> thanks,
> Manoj
>
>
>