do concurrent in parallel? speed-up?

[Damian Rouson]

On Tue, 11 Feb 2014 13:15:34 -0500, Tim Prince wrote:

> I've turned my masked do concurrents into DO loops with MERGE for the benefit of gfortran 4.9. ifort 
> needs VECTOR ALIGNED directives to get full performance of masked DO CONCURRENT, and it's still fully 
> effective only for single thread vectorization.

Could you provide a simple example and give rough estimates of the resulting speedup with gfortran 4.9 and the CPU employed?

Damian