Hi, how did you manage to get an answer from Google that fast?
http://www.google.com/hostednews/afp/article/ALeqM5gK2BT8m9EhMCL0gI-yqyut3UOz-A?docId=CNG.8da7524161341a630734bbb6cf9ce6e4.231 Erich On Thursday 08 September 2011 11:53:28 Stefan Schaeckeler wrote: > Hi all, please don't take this posting too serious. I was just curious ... > > Just the other day, I bought a kill-a-watt. Among other things, I measured > the "cost of a source based package system", i.e. I was comparing the energy > cost of installing ports from source vs binary packages (setup, see below). > > Case 1: Source based installation > Time: 7 hours, 3 min > Energy: 0.489 kw*h > Price: 4.89 US cent > > Case 2a: Binary packages based installation > Time: 1 hour, 57 min > Energy: 0.079 kw*h > Price: 0.79 US cent > > If the computer is constantly running, then we should add the installation > time of case 1 to case 2a: > > Case 2b: Binary packages based installation > Time: 7 hours, 3 min > Energy: (40/1000)kw*(7.05-1.95)h + 0.079 kw*h = 0.283 kw*h > Price: 2.83 US cent > > > > Using source based ports is with almost 5 US cents 6.19 times (case 1 vs case > 2a) or 1.73 times (case 1 vs case 2b) more expensive than using binary > packages :) > > > - Stefan > > > > Details: > > Price: 1 kw*h = 10 US cent. > > Kill-a-Watt trick: by setting the price per kw to $9.999 (= $10), I could get > one more digit of accuracy for the consumed energy by dividing the price by > 10. > > HW: Sony vaio pcg-k23 laptop (pentium 4, 2,8 GHz, huge display). Booted into > FreeBSD, it consumes around 40 Watt ("idle"). When compiling programs, the > power consumption doubles to somewhat above 80 Watt. Internet connection > 768kb/s. > > SW: Installed 259 ports via this script: > --- snip --- > date > for i in /usr/ports/x11/xorg-minimal\ > /usr/ports/x11/xorg-apps\ > /usr/ports/x11/xorg-cf-files\ > /usr/ports/x11/xorg-docs\ > /usr/ports/x11/xorg-libraries\ > /usr/ports/shells/bash3\ > /usr/ports/print/teTeX\ > /usr/ports/editors/emacs\ > /usr/ports/editors/joe2\ > /usr/ports/multimedia/xmms\ > /usr/ports/multimedia/ffmpeg\ > /usr/ports/lang/clisp\ > /usr/ports/lang/hugs\ > /usr/ports/lang/swi-pl\ > /usr/ports/lang/llvm-gcc4\ > /usr/ports/lang/gnat\ > /usr/ports/lang/Gofer\ > /usr/ports/x11-toolkits/tk86 > do > cd $i && yes o | make install clean > done > date > halt -p > --- snip --- > > Similarly, 246 binary packages have been installed via pkg_add -r. > > pkg_delete /var/db/pkg/* > rm -rf /usr/ports/distfiles/ > > PACKAGESITE=ftp://ftp.freebsd.org/pub/FreeBSD/ports/i386/packages-8-stable/Latest/ > export PACKAGESITE > > --- snip --- > date > for i in xorg-minimal\ > xorg-apps\ > xorg-cf-files\ > xorg-docs\ > xorg-libraries\ > bash3\ > teTeX\ > emacs\ > joe2\ > xmms\ > ffmpeg\ > clisp\ > hugs\ > swi-pl\ > llvm-gcc4\ > gnat\ > Gofer\ > tk86 > do > pkg_add -r $i > done > date > halt -p > --- snip --- > > > The number of ports and binary packages varies slightly. I don't know why. > This only introduces a small error. > _______________________________________________ > freebsd-ports@freebsd.org mailing list > http://lists.freebsd.org/mailman/listinfo/freebsd-ports > To unsubscribe, send any mail to "freebsd-ports-unsubscr...@freebsd.org" > > _______________________________________________ freebsd-ports@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-ports To unsubscribe, send any mail to "freebsd-ports-unsubscr...@freebsd.org"
