Glen, On Mon, 9 Feb 2015, Glen Barber wrote:
> > > Log: > > > Merge xz 5.2.0. > > > > > > This brings support for multi-threaded compression. This brings close > > > N times faster compression where N is the number of CPU cores. > > > Because of this, liblzma now depends on libthr. > > > > This is fantastic, thank you for doing this update. > > > > FWIW, compressing VM images (some sparse files, some not) would take > > upwards of 45 minutes, which after this update, just takes a few > > minutes. > > > > root@releng2:/R2/vmimages # time xz -T 0 -k > > FreeBSD-11.0-CURRENT-amd64.qcow2 \ > > time xz -T 0 -k FreeBSD-11.0-CURRENT-amd64.raw; \ > > time xz -T 0 -k FreeBSD-11.0-CURRENT-amd64.vhd; \ > > time xz -T 0 -k FreeBSD-11.0-CURRENT-amd64.vmdk > > 1027.602u 40.376s 1:09.57 1535.1% 81+192k 0+19774io 0pf+0w > > 1032.978u 38.823s 1:08.17 1572.2% 81+192k 0+19696io 0pf+0w > > 1033.908u 38.593s 1:11.70 1495.8% 81+192k 0+19729io 0pf+0w > > 1091.749u 42.371s 1:04.27 1764.6% 81+192k 0+19751io 0pf+0w > > > > I meant to include that this is on a 48-core machine. Hm, I can't beleive you didn't use pxz ;) Anyway, having this in base, and not depending on external tool, is amazingly great. BTW, Rui, did you some comparative tests with pxz? -- Sincerely, D.Marck [DM5020, MCK-RIPE, DM3-RIPN] [ FreeBSD committer: ma...@freebsd.org ] ------------------------------------------------------------------------ *** Dmitry Morozovsky --- D.Marck --- Wild Woozle --- ma...@rinet.ru *** ------------------------------------------------------------------------ _______________________________________________ svn-src-all@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/svn-src-all To unsubscribe, send any mail to "svn-src-all-unsubscr...@freebsd.org"
