[Carpet] Carpet regridding

[Erik Schnetter]

On Oct 28, 2006, at 03:27:57, Ian Hinder wrote:

> Hi,
>
> When using CarpetRegrid and the coordinates string, and if I say
> 'regrid_every = 1', then does Carpet actually do any work if the grid
> structure from the coordinates string has not changed?  It definitely
> says 'Recomposing the grid hierarchy', so it looks like it is doing
> work.  If this is the case, would it be easy to add an optimization so
> that if the grid structure has not changed nothing is done?

CarpetRegrid just decides the grid structure; the real work is always  
done by Carpet and CarpetLib.  I interpret your idea as a performance  
optimisation.  Old versions of Carpet did not contain these  
optimisations, new versions should be much better in that respect.

The development version of Carpet should contain this optimisation,  
the stable version does not.

-erik

-- 
Erik Schnetter <schnetter at cct.lsu.edu>

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