vchoi_fork

[svn-r2610] Purpose:
    Code Optimization.
Description:
    The optimized routines for copying regular hyperslabs in memory have been
    using the same matrix routines to copy their hyperslab pieces as the
    routines for irregularly shaped hyperslabs.  This ends up imposing lots of
    extra overhead on the optimized routine, since it basically "knows" all the
    matrix information it needs.
Solution:
    Keep track of the [small] amount of matrix information necessary to perform
    the regular hyperslab copies in the optimized routines themselves instead of
    using the matrix routines.  This improves the performance for the benchmark
    I'm running from ~18 seconds to ~12 seconds and should apply to parallel
    I/O situations also.
Platforms tested:
    Solaris 2.6 (i.e. baldric)