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Subject: Re: [ublas] eigen Vs. ublas
From: Umut Tabak (u.tabak_at_[hidden])
Date: 2011-04-11 08:53:18

On 04/11/2011 02:32 PM, Karl Rupp wrote:
> Hi Umut,
> we have recently added a interface for eigen (v2.0.15) and MTL in
> ViennaCL, where we have also compared iterative solver performance.
> For a unpreconditioned CG with 100 iterations, we obtained for our 65k
> sample matrix the following timings:
> ViennaCL-CG with MTL: 0.67 sec
> ViennaCL-CG with Eigen2: 0.27 sec
> ViennaCL-CG with ublas: 0.52 sec
> All three libraries are used "as is" without further tuning anything.
> NDEBUG is set. Timings will differ with other sparsity patterns, of
> course ;-)
Hi Karl,
This is exact the comparison I was looking for, thanks a lot, so eigen
seems to be the fastest for this matrix structure.