On Mon, 18 Nov 2013, Thorsten Glaser wrote: > Finn Thain dixit: > > >I don't know how much memory is needed by the "xz -0d" algorithm. The > >xz > > RTFM ;-) > > Preset DictSize CompCPU CompMem DecMem > -0 256 KiB 0 3 MiB 1 MiB > -1 1 MiB 1 9 MiB 2 MiB > -2 2 MiB 2 17 MiB 3 MiB > -3 4 MiB 3 32 MiB 5 MiB > -4 4 MiB 4 48 MiB 5 MiB > -5 8 MiB 5 94 MiB 9 MiB > -6 8 MiB 6 94 MiB 9 MiB > -7 16 MiB 6 186 MiB 17 MiB > -8 32 MiB 6 370 MiB 33 MiB > -9 64 MiB 6 674 MiB 65 MiB > > It depends on what it was _compressed_ with.
Right. > > Rule of thumb: xz -0 is faster than gzip -6 in compression and has about > the same ratio... For the kernel binary, xz -0 has a better ration than gzip -9. RTFOP ;-) > With -e, compression ratio increases... Indeed it does (though the man page warns that it can get worse): $ gzip -d < vmlinux-3.12.0-mac.gz | xz -0c | wc -c 1325352 $ gzip -d < vmlinux-3.12.0-mac.gz | xz -0ec | wc -c 1196876 Finn -- To UNSUBSCRIBE, email to [email protected] with a subject of "unsubscribe". Trouble? Contact [email protected] Archive: http://lists.debian.org/[email protected]
