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Ublas : |
Subject: Re: [ublas] Matrix multiplication performance
From: Michael Lehn (michael.lehn_at_[hidden])
Date: 2016-01-27 10:54:28
On 27 Jan 2016, at 16:52, Michael Lehn <michael.lehn_at_[hidden]> wrote:
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>> 5. ublas is one of the fastest libraries for small matrices. Because I think the most prevalent use of dense multiplication is on small matrices ( geometric transformations etc.) we need to make sure this stays that way.
>
> Depends on the domain of usage. In my domain dense matrix multiplication is the key to both, fast dense linear algebra (LAPACK etc.) and
> sparse direct or iterative solvers. But sure, we should have both.
(Iterative solvers are only fast if you use pre conditioners that “smell" like direct solvers)