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Path: euryale.cc.adfa.oz.au!newshost.carno.net.au!harbinger.cc.monash.edu.au!munnari.OZ.AU!news.ecn.uoknor.edu!feed1.news.erols.com!news.bbnplanet.com!cpk-news-hub1.bbnplanet.com!worldnet.att.net!arclight.uoregon.edu!hammer.uoregon.edu!csulb.edu!drivel.ics.uci.edu!news.service.uci.edu!isotope.ps.uci.edu!dkleinh From: dkleinh@isotope.ps.uci.edu (Dirk Kleinhesselink) Newsgroups: comp.unix.bsd.freebsd.misc Subject: FreeBSD slower than Linux ? Date: 30 Jan 97 20:03:20 GMT Organization: University of California, Irvine Lines: 11 Message-ID: <dkleinh.854654600@isotope.ps.uci.edu> NNTP-Posting-Host: isotope.ps.uci.edu Summary: FreeBSD 2.1.5 uses 2 to 2.5x more CPU time than Linux - why ? Keywords: FreeBSD, Linux, CPU time X-Newsreader: NN version 6.5.0 #6 (NOV) Xref: euryale.cc.adfa.oz.au comp.unix.bsd.freebsd.misc:34423 I have been benchmarking a program on various machines and discovered that the program -- fortran program -- runs 2 to 2.5 times faster on Linux (Slackware 2.3 - Slackware 96) than on FreeBSD 2.1.5. I have both Linux and FreeBSD on my Pentium 100 Mhz, 48MB RAM and was pretty surprised. I'm compiling my program with the stock g77 that comes with each OS. I know Linux is using gcc-2.7.2 and FreeBSD is using gcc-2.6.3 and so I went back to my old Slackware 2.3, which has gcc-2.6.3 and this was still twice as fast. Anyone have any ideas why ? Dirk dkleinh@isotope.ps.uci.edu