gcc 4.5 apparently adds "profile guided optimization", which, as I understand it uses information from previous runs of the DSOs to determine the relative frequency with which each branch is taken. Python has a good benchmarking suite, which simulates real-world workloads. See http://hg.python.org/benchmarks/ From the README.txt: "This project is intended to be an authoritative source of benchmarks for all 5 Python implementations. The focus is on real-world benchmarks, rather than 6 synthetic benchmarks, using whole applications when possible." It may be worth integrating this into the build somehow. It's not clear to me whether we can cache the data, or if we need to actually run the benchmarking suite during the build, then rebuild. We should also use the benchmarking suite to measure performance, and see what impact pgo actually has.
The upstream Makefile has a profile-opt target to handle this, although the workload it runs is just PROFILE_TASK= $(srcdir)/Tools/pybench/pybench.py -n 2 --with-gc --with-syscheck and pybench.py isn't a very representative workload. Upstream bug tracker also has this entry: http://bugs.python.org/issue5060
This package has changed ownership in the Fedora Package Database. Reassigning to the new owner of this component.
python2-2.7.13-8.fc26 has been submitted as an update to Fedora 26. https://bodhi.fedoraproject.org/updates/FEDORA-2017-c9348ce39b
python-2.7.13-2.fc24 has been submitted as an update to Fedora 24. https://bodhi.fedoraproject.org/updates/FEDORA-2017-05913d5475
python-2.7.13-2.fc25 has been submitted as an update to Fedora 25. https://bodhi.fedoraproject.org/updates/FEDORA-2017-de7201b17a
python-2.7.13-2.fc25 has been pushed to the Fedora 25 testing repository. If problems still persist, please make note of it in this bug report. See https://fedoraproject.org/wiki/QA:Updates_Testing for instructions on how to install test updates. You can provide feedback for this update here: https://bodhi.fedoraproject.org/updates/FEDORA-2017-de7201b17a
python-2.7.13-2.fc24 has been pushed to the Fedora 24 testing repository. If problems still persist, please make note of it in this bug report. See https://fedoraproject.org/wiki/QA:Updates_Testing for instructions on how to install test updates. You can provide feedback for this update here: https://bodhi.fedoraproject.org/updates/FEDORA-2017-05913d5475
python2-2.7.13-8.fc26 has been pushed to the Fedora 26 testing repository. If problems still persist, please make note of it in this bug report. See https://fedoraproject.org/wiki/QA:Updates_Testing for instructions on how to install test updates. You can provide feedback for this update here: https://bodhi.fedoraproject.org/updates/FEDORA-2017-c9348ce39b
python2-2.7.13-8.fc26 has been pushed to the Fedora 26 stable repository. If problems still persist, please make note of it in this bug report.
python-2.7.13-2.fc25 has been pushed to the Fedora 25 stable repository. If problems still persist, please make note of it in this bug report.
python-2.7.13-2.fc24 has been pushed to the Fedora 24 stable repository. If problems still persist, please make note of it in this bug report.
Python 2.7.13 has been moved to stable in fedora 25.This bug cannot be reproducable in fedora 25