How does nature do its computations?

It seems to me that you and Wen are asking the same question, but from different perspectives. Wen's point of view is human-centered, that we're looking at the physical world in a very inefficient way, that it is our failing. I think your point of view is universe-centered. (Or is it?) Why does nature perform any computations? Nature is the solution that exists in principle, and sometimes if we're lucky, it exists also in our calculations.