Le jeudi 23 août 2012 à 14:26 -0600, Bob Proulx a écrit : > Jon Dowland wrote: > > Bob Proulx wrote: > > > Jon Dowland wrote: > > > > linux-3.6-rc2.tar.bz2 78M > > > > linux-3.6-rc2.tar.gz 99M > > > > linux-3.6-rc2.tar.xz 65M > > > linux-3.6-rc2.tar.lz 66M > > > > > > I think lzip is worthy enough that it should have a mention too. It > > > has gotten less attention than xz and that is sad since it is a nice > > > free software tool. I recompressed that file using lzip for this > > > comparison. > > > > Thanks for the data (mashed/reformatted into quote above). I copied the > > listings from the kernel.org archives, so the choice of compression types > > was theirs (although I hadn't heard of lzip, thanks!) > > There is a problem with the mashing and reformatting. It makes lzip > appear to be 66M against xz being 65M and so xz is better, right? But > wait the above says that gz is 99M. But ls says 100M. So the listed > sizes are not 100% correct. So 66M is true if 100M is true. But it > seems that something was truncating down to 99M and so perhaps that > 65M is actually 66M? In which case xz and lz were actually the same > for that sample. Or perhaps if they count 65M as true for xy then > perhaps it should be 65M for lz too? > > I think you see the problem. I don't really know from the above data > whether xz or lz is the same or worse or better. > > I didn't go and download the linux-3.6-rc2.tar.xz file to see what > size it actually should be listed as. I probably should have. But I > didn't have the time. > > It would be better to look at the long byte counts for this type of > comparison. > > Bob
Even if you are perfectly right, I wouldn't look at the long byte count. A MB today is downloaded in 1s with most internet connection and if you take linux-2.6 archive or your whole / partition archive, you might see that lz/xz performs worse/better that xz/lz considering file size. >From my point of view, I see two programs performing almost equally well on a big bunch of ascii files on this hardware. So the next question would be "which one is faster?" and even before that, I would wonder "Are these programs available on my cluster?" But once again you are perfectly right to ask for more precision, I just say that there are high chances that you won't be able to conclude anything. -- To UNSUBSCRIBE, email to debian-user-requ...@lists.debian.org with a subject of "unsubscribe". Trouble? Contact listmas...@lists.debian.org Archive: http://lists.debian.org/1345799759.4875.13.ca...@p76-nom-gd.cnrs-imn.fr
