Thomas Preud'homme wrote: > The Monday 22 December 2008 13:53:43 Eugene V. Lyubimkin, you wrote : >> Volkan YAZICI wrote: >>> Hi, >>> >>> Are there any compression tools in the official Debian GNU/Linux >>> repositories that can take the benefit of multiple cores/cpus? >> pbzip2? > > > I profit of this thread to ask you if you see amelioration with pbzip2. I made > 2 tests on file of 50 MB and the result if approximately the same time as > bzip2 (a little much longer with pbzip2 !!!) but a CPU twice time more used. > I have a core 2 duo and time give me a usage of almost 200% with pbzip2 > > Anyone has better results ? Yes, see following: jackyf@work:~/temp$ time tar -cjf temp1.tar.bz2 debian real 0m18.830s user 0m18.317s sys 0m0.268s jackyf@work:~/temp$ time bash -c "tar -cf - debian | pbzip2 -c > temp2.tar.bz2" real 0m10.494s user 0m19.557s sys 0m0.488s 10 is much less than 18. -- Eugene V. Lyubimkin aka JackYF, JID: jackyf.devel(maildog)gmail.com Ukrainian C++ Developer, Debian Maintainer, APT contributor
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