[Carpet] Tapered grids

[Ian Hawke]

On Fri, 2006-05-05 at 09:33 -0500, Erik Schnetter wrote:

> If you want to use tapered grids to avoid the storage for past time  
> levels, consider the following:

...

> That is, you will need more memory, not less.  

Of course, _in theory_ you would expect higher _order_ accuracy with the
tapered grid approach, so you may find that you require less points (and
hence memory use) for the same error. But this will not be known until
it is tested.

Note that this only applies to the evolution; using fewer levels will
lead to _less_ accurate time interpolation for things such as horizon
finding and wave extraction. Again, this _may_ be balanced by higher
accuracy of the evolved variables.

Ian