PBZIP2 is a parallel implementation of the bzip2 block-sorting file compressor
that uses pthreads and achieves near-linear speedup on SMP machines. The output
of this version is fully compatible with bzip2 v1.0.2 (ie: anything compressed
with pbzip2 can be decompressed with bzip2).

WWW: http://compression.ca/pbzip2/
Author: Jeff Gilchrist <pbzip2 [at] compression {dot} ca>