title: Multiprocessor support for `xz`?
body: <p>Is there a way to spread <code>xz</code> compression efforts across multiple CPU's?  I realize that this doesn't appear possible with <code>xz</code> itself, but are there other utilities that implement the same compression algorithm that would allow more efficient processor utilization?  I will be running this in scripts and utility apps on systems with 16+ processors and it would be useful to at least use 4-8 processors to potentially speed up compression rates.</p>