On Wed, 2 Dec 2015 19:52:17 +0100 Andreas Enge <[email protected]> wrote:
> How about this: > http://anthon.home.xs4all.nl/rants/2013/parallel_xz/ > ? > > Andreas > > From what I've read, parallel bzip breaks everything into chunks and then reassembles everything into a .tar.bz2 file. On one of my mail folders containing ~3000 pieces of mail ~1GiB, my 2 core laptop took 10 minutes with bzip and 7 minutes with pbzip to compress the mail, with the resulting .tar.bz2 files being ~100KiB difference in size. I didn't get a chance to test decompression because my battery died :). One of the big plusses to pbzip is that the compressed files are fully compatable with bzip, and I believe all the normally used flags are also usable. It can also be dropped into tar with --use-compress-prog=pbzip2. Parallel xz I know much less about. -- Efraim Flashner <[email protected]> אפרים פלשנר GPG key = A28B F40C 3E55 1372 662D 14F7 41AA E7DC CA3D 8351 Confidentiality cannot be guaranteed on emails sent or received unencrypted
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