New in 0.9.2:
* Created workaround for a major pthreads problem (on Linux at
least) that would cause segfaults and missed signals in the
pthreads library itself when mutexes or signals were
created/destroyed too quickly. This used to happen when
processing multiple files, but now pbzip2 only generates its
mutexes and signals at the beginning and reuses the same ones
for multiple files. Special thanks to George Chalissery for help
with this one.
* Increased size of BZIP2 header match from 56 bits to 72 bits for
more accurate detection
* Modified some buffers to use the vector class for easier memory
management and to eliminate one read pass of the input data for
decompression so should be slightly faster.
* Now checks if input file exists before checking if output file
already exists (when not using -f)
* Now checks to ensure input is regular file and not a directory
before processing
* Now deletes input file only if output file exists and is greater
than 0 bytes (-k will always preserve input file)
* Now checks input file for bzip2 header before trying to
decompress file
* Minor code cleanup
New in 0.9.1
* Fixed bug: -c switch now implies -k so input file is not deleted
when data is output to stdout
New in 0.9.0:
* Added -c switch for data output to stdout
* Added -t switch to test integrity of compressed data
* Added autodetection for # of CPUs on supported platforms and
made detected value default # CPUs to use
* Fixed bug where pbzip2 processed 0 byte files
* Tried to make program exit codes the same as bzip2
The pbzip2 program is a parallel version of bzip2 for use on shared
memory machines. It provides near-linear speedup when used on true
multi-processor machines and 5-10% speedup on Hyperthreaded machines.
The output is fully compatible with the regular bzip2 data so any
files created with pbzip2 can be uncompressed by bzip2 and vice-versa.
