Compile for a specific number of nodes (i.e. specify a value to the
-wsf option) for production code, if possible. If you
compile using -wsf but do not specify a value, only one
dimension of any array is distributed. If the performance of your
code depends on distributing more than one dimension, it executes
more slowly if you do not specify a value with the -wsf
option. In addition, even code that only distributes one dimension
of an array may execute more slowly if no value was specified with
-wsf because addressing expressions may take longer to
evaluate.
