Date: Mon, 9 Feb 2015 16:08:00 +0300 (MSK) From: Dmitry Morozovsky <marck@rinet.ru> To: Glen Barber <gjb@freebsd.org> Cc: svn-src-head@freebsd.org, svn-src-all@freebsd.org, src-committers@freebsd.org, Rui Paulo <rpaulo@freebsd.org> Subject: Re: svn commit: r278433 - in head: . contrib/xz contrib/xz/src/common contrib/xz/src/liblzma contrib/xz/src/liblzma/api contrib/xz/src/liblzma/api/lzma contrib/xz/src/liblzma/check contrib/xz/src/liblz... Message-ID: <alpine.BSF.2.00.1502091606070.94441@woozle.rinet.ru> In-Reply-To: <20150209123057.GF84467@hub.FreeBSD.org> References: <201502090620.t196KZSk040702@svn.freebsd.org> <20150209122540.GE84467@hub.FreeBSD.org> <20150209123057.GF84467@hub.FreeBSD.org>
next in thread | previous in thread | raw e-mail | index | archive | help
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: marck@FreeBSD.org ] ------------------------------------------------------------------------ *** Dmitry Morozovsky --- D.Marck --- Wild Woozle --- marck@rinet.ru *** ------------------------------------------------------------------------
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?alpine.BSF.2.00.1502091606070.94441>