On Fri, 2013-12-20 at 14:10 -0500, Neal Becker wrote: > I was reading some of the discussion of feedback directed optimization and link > time optimization for python here: > > http://permalink.gmane.org/gmane.comp.python.devel/143941 > > I'm wondering if Fedora should be enabling some of these optimizations? We discussed doing this a while back for CPython in Fedora; it's probably worthwhile, but AFAIK no-one's gotten around to it. I filed a couple of bugs to track this: Python 2: https://bugzilla.redhat.com/show_bug.cgi?id=613045 Python 3: https://bugzilla.redhat.com/show_bug.cgi?id=613046 so if someone wants to try to implement this, that would be great. IIRC the upstream makefile already has a pre-canned way to do at least the PGO of this - but we'd need to set things up so that there's a "training" run to generate the profile data for the PGO build. I'd recommend using the upstream Python benchmarking suite: http://hg.python.org/benchmarks since it contains examples of real, idiomatic code, rather than made-up benchmarks, and hence is likely to be good "training" for the PGO. IIRC Debian's builds already do something like this. [FWIW, note that LTO has seen some big improvements in gcc upstream, which should land within the upcoming 4.9] Hope this is helpful Dave -- devel mailing list devel@xxxxxxxxxxxxxxxxxxxxxxx https://admin.fedoraproject.org/mailman/listinfo/devel Fedora Code of Conduct: http://fedoraproject.org/code-of-conduct
