On Fri, May 02, 2003 at 03:33:34PM +1000, Tim Robbins wrote: > On Fri, May 02, 2003 at 04:13:07AM +0300, Ruslan Ermilov wrote: > > > This is just an announcement that I'm going to add bzip2(1) > > support to man(1) and makewhatis(1) (catman(1) already has > > it), and then switch the default compression method from > > gzip(1) to bzip2(1), for manpages, Groff and Texinfo docs. > > (The latest 4.5 texinfo supports bzip2.) > > I don't mean to sound rude, but what is the justification for this? > Sorry to be sounding obvious, but what other use other than better compression one should expect from a compression tool? > An extremely rough test: > > $ time bzip2 -c sh.1 | wc -c > 16099 > 0.24s real 0.21s user 0.03s system > $ time gzip -c sh.1 | wc -c > 18036 > 0.12s real 0.10s user 0.01s system > > bzip2 takes ~2 times as long as gzip and the resulting file with bzip2 is ~0.9 > times the size of the gzip file. > > bzip2 does not seem to perform significantly better on small files: > > $ time gzip -c who.1 | wc -c > 2168 > 0.03s real 0.00s user 0.00s system > $ time bzip2 -c who.1 | wc -c > 2208 > 0.04s real 0.03s user 0.00s system > If you're bothered with times, I suggest that you put NOMANCOMPRESS, NODOCCOMPRESS, and NOINFOCOMPRESS into /etc/make.conf. That will positively affect the buildworld times too. FWIW, I'm only going to change the default, the possibility to use gzip(1) will still be there. Cheers, -- Ruslan Ermilov Sysadmin and DBA, ru_at_sunbay.com Sunbay Software AG, ru_at_FreeBSD.org FreeBSD committer, +380.652.512.251 Simferopol, Ukraine http://www.FreeBSD.org The Power To Serve http://www.oracle.com Enabling The Information Age
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