SMP Version of tar

[Joerg Sonnenberger]

On Mon, Oct 01, 2012 at 10:16:53PM -0700, Tim Kientzle wrote:
>   * Implement within libarchive directly.  This would benefit tar and
>     a handful of other programs that use libarchive, but may not be
>     worth the complexity.

The complexity shouldn't actually be that bad. Basically, use a large
internal buffer in the compression filter and make the queueing for
distribution to threads an implementation detail. Alternatively, just
provide a compatible implementation of libz's event interface.

Joerg