[Carpet] Carpet regridding

[Ian Hinder]

Erik Schnetter wrote:
> 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.

Ah good.  Thanks.  By the stable version now you mean carpet-stable-3?

-- 
Ian Hinder
hinder at gravity.psu.edu
http://www.gravity.psu.edu/~hinder