ERSEK Laszlo wrote: > A trivial reason to use bzip2 is to decompress a file downloaded from the > internet. If you have a multi-core CPU and the file was compressed with > standard bzip2, you might want to use lbzip2. Perhaps even automatically.
If you download and decompress with bzip2, it takes download_time + bzip2_time. If you download and decompress with lbzip2, it takes download_time + bzip2_time/ncores. Decompressing concurrently with the download is faster than both: it takes a total of max(download_time,bzip2_time). The download is usually the slowest, so we can just say it takes download_time. Here's one way: curl http://example.com/file.tar.bz2 | tee file.tar.bz2 | bunzip2 > file.tar My usual command is actually this: ~/src$ curl http://example.com/file.tar.bz2 | tee ~/downloads/file.tar.bz2 | tar xjv -- Nicolas I read mailing lists through Gmane. Please don't Cc me on replies; it makes me get one message on my newsreader and another on email. -- To UNSUBSCRIBE, email to debian-mentors-requ...@lists.debian.org with a subject of "unsubscribe". Trouble? Contact listmas...@lists.debian.org
