dolfin team mailing list archive

[Anders Logg <logg@xxxxxxxxx>]

On Tue, Feb 19, 2008 at 06:50:58PM +0100, Johan Jansson wrote:
> Hi!
>
> We've run into what appears to be a strange bug with applying boundary
> conditions to uBlasMatrix. We implement assembly and boundary condition
> application (BoundaryCondition::apply()) in two different ways: manually
> and by LinearPDE. In the manual case (which replicates the LinearPDE
> implementation), we see an extreme slowdown in what looks to be the
> uBlasMatrix::ident() function. If we use the LinearPDE implementation the
> performance is as expected.
>
> I'm attaching a simple test case which demonstrates the issue. Has anyone
> experienced a similar issue or has an idea what goes wrong?
>
> This is with DOLFIN 0.7.2 (and should also appear with 0.7.1).
>
> Thanks,
>  Johan

I tried to run it and I don't see any slowdown when uncommenting the
apply stuff.

-- 
Anders