On Thu, Mar 2, 2017 at 4:07 AM, Antoine Pitrou <solip...@pitrou.net> wrote: > On Wed, 1 Mar 2017 19:58:14 +0100 > Matthias Klose <d...@ubuntu.com> wrote: >> On 01.03.2017 18:51, Antoine Pitrou wrote: >> > As for the high level: what if the training set used for PGO in Xenial >> > has become skewed or inadequate? >> >> running the testsuite > > I did some tests a year or two ago, and running the whole test suite is > not a good idea, as coverage varies wildly from one functionality to the > other, so PGO will not infer the right information from it. You don't > get very good benchmark results from it. > > (for example, decimal has an extensive test suite which might lead PGO > to believe that code paths exercised by the decimal module are the > hottest ones) > > Regards > > Antoine. >
FYI, there are "profile-opt" make target. It uses subset of regrtest. https://github.com/python/cpython/blob/2.7/Makefile.pre.in#L211-L214 Does Ubuntu (and Debian) use it? _______________________________________________ Python-Dev mailing list Python-Dev@python.org https://mail.python.org/mailman/listinfo/python-dev Unsubscribe: https://mail.python.org/mailman/options/python-dev/archive%40mail-archive.com
