Building R for better performance

could you tell us if the same/similar performance benefits we should 
expect when gnu complier suite + MKL are teamed up?
and how to configure such a compilation?
many thanks

Jonathan, thanks for these very interesting results.  I'm curious how
the single core performance of the different compiler compare.

Sometimes it's desirable to keep code to a single core, e.g., if you
have assigned n jobs to n cores you don't want each job trying to grab
more cores.

Ross Boylan