Date: Tue, 27 Apr 2010 10:05:18 +0200 From: Roman Divacky <rdivacky@FreeBSD.org> To: Dominic Fandrey <kamikaze@bsdforen.de> Cc: freebsd-current@FreeBSD.org Subject: Re: ClangBSD build failures Message-ID: <20100427080518.GA31918@freebsd.org> In-Reply-To: <4BD68275.6020509@bsdforen.de> References: <4BD68275.6020509@bsdforen.de>
next in thread | previous in thread | raw e-mail | index | archive | help
On Tue, Apr 27, 2010 at 08:21:41AM +0200, Dominic Fandrey wrote: > Hello, > > I wanted to make some performance comparisons, building ClangBSD > with different compilers. > > The host system is: > FreeBSD mobileKamikaze.norad 8.0-STABLE FreeBSD 8.0-STABLE #0: Mon Apr 5 12:45:41 CEST 2010 root@mobileKamikaze.norad:/usr/obj/HP6510b-8/amd64/usr/src/sys/HP6510b-8 amd64 > > An interesting result is that buildkernel with clang takes longer: > CC=clang > time -l make buildkernel > 921.31 real 802.25 user 114.93 sys > time -l make buildkernel -j3 > 645.17 real 838.46 user 143.03 sys > > CC=cc > time -l make buildkernel > 877.14 real 757.42 user 115.11 sys > time -l make buildkernel -j3 > 628.32 real 798.03 user 149.52 sys fwiw.. these are my times: clang: 403.342u 42.516s 6:53.30 107.8% 21957+2248k 33+56671io 364pf+0w gcc: 451.952u 42.860s 7:23.16 111.6% 6564+2012k 78+43200io 3pf+0w note that clang build had more page faults thus would be a little faster without them
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?20100427080518.GA31918>