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Lbzip2 is a multithreaded utility for handling `bzip2' compression, written by Laszlo Ersek. It makes use of multiple processors to speed up its operation and in general works considerably faster than bzip2. For a detailed description of lbzip2 see http://freshmeat.net/projects/lbzip2 and lbzip2: parallel bzip2 utility.

Recent versions of lbzip2 are mostly command line compatible with bzip2, which makes it possible to automatically invoke it via the `--bzip2' GNU tar command line option. To do so, GNU tar must be configured with the `--with-bzip2' command line option, like this:

$ ./configure --with-bzip2=lbzip2 [other-options]

Once configured and compiled this way, tar --help will show the following:

$ tar --help | grep -- --bzip2
  -j, --bzip2                filter the archive through lbzip2

which means that running tar --bzip2 will invoke lbzip2.

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