With DIGITAL PCA, you can examine how you have split the
    processing of the application between scalar and vector
    processors. You can also analyze how well your application's
    algorithms use the vector processor. Certain programs can run
    significantly faster on computers containing scalar and vector
    processors than on those containing scalar processors alone.
    Programs that use repetitive array and matrix operations can
    run faster on a vector processor because they are the most
    constrained by scalar performance bottlenecks. Programs that
    spend most of their time performing I/O operations, system
    services, or using data types not supported by vector hardware
    (for example, BYTE and LOGICAL) do not benefit as much by being
    executed on a computer with both scalar and vector processors.