[Dune] How fast is Dune? Benchmark data anyone?

[Christoph Grüninger]

Dear Dune developers and users,
a common argument against Dune by people not using Dune is the 
suspicion that it is slow. It is considered to not be true, but 
has anyone ever measured a real complex simulation and got 
benchmark data? I asked already some participants on the Dune 
user Meeting 2010 in Stuttgart but nobody knew numbers.

- So are there data from runs on supercomputers and the reached 
percentage of the theoretical peak performance?
- Are there users who ported their old simulations to Dune and 
where able to compare the same methods with different codes?
- Where there any benchmark problems to compare the results 
speed-wise with results from groups with other codes?

If there are some performance proofs out there we should collect 
them in the wiki.

Yours sincerely,
Christoph