On Sat, May 13, 2017 at 11:39:20PM +0100, Ken Moffat wrote: > On Fri, May 12, 2017 at 02:23:58PM -0500, Bruce Dubbs wrote: > > > > One issue I found with gcc7 is that it seems to be much slower than gcc6 > > when building packages. My -j1 time for binutils has gone from 107 seconds > > to 140 seconds, about a 30% increase. If others have a different result, I > > would like to hear about it. > > > You're not kidding. I haven't built binutils pass 1 *from* 7.1 yet > (just got to the end of chapter 6). Earlier this week I did a build > of LFS svn 2017-05-01 from the same version, without tests, using -j8 > except for binutils pass 1 (trying one of the symlinks that DJ has > now added to LFS), so a really minimal build. That took 19m04 for my > chapter 5 script (now 20m00), and 23m22 for chroot (now a net time of > 24m02. > > More details might follow if it builds enough of BLFS to try booting > (but this time I'll definitely go back to chroot for most of BLFS, > and I'm in no rush - this has to fit in when I'm not *using* the > current system > Well, that was unpleasant - yesterday I should, with hindsight, have stayed away from the computer (mounted the wrong partition at /mnt/lfs, then after it panic'd when I tried to boot I managed to lose the misplaced-build while restoring what should have been on that partition (my 8.0 build, so I still need it for tagging things). <sigh/>
Built again, including DJ's fixes for the debug symbols (*nice*) but running tests on everything: Comments on two packages will follow on lfs-dev. The SBU from gcc-6.3 / 2017-05-01 was 77.151s, my unreliable repeat-SBU is 90.892s which is only a 17% worsening (haswell i7). I note that is unreliable because my own scripts always seem to take a lot longer when running a repeat-SBU calculation - I've sat looking at them, but I can't see what takes the extra time. For firefox I see you've fixed the 53.0.2 version - I'm still building 53.0 at the moment with the existing by-the-book instructions and the patch, I don't see the 53.0.2 version of the patch in patches ? ĸen -- I live in a city. I know sparrows from starlings. After that everything is a duck as far as I'm concerned. -- Monstrous Regiment -- http://lists.linuxfromscratch.org/listinfo/blfs-dev FAQ: http://www.linuxfromscratch.org/blfs/faq.html Unsubscribe: See the above information page
