Hello, Following doko's advice, I ran a set of test with PGO & LTO optimization disabled.
Here are the results : https://docs.google.com/spreadsheets/d/1tTlEOvMypwKwi99XHjvuQFE14_jpBBLy0-Mk6bjkvL0/edit#gid=1169944329 This may bring more light to the investigation as it appear that with LTO & PGO optimisation disabled on Trusty, the trusty version becomes slower than the Xenial stock version. Disabling optimisation on Xenial makes little difference though. So maybe the PGO & LTO optimisation on Trusty is more efficient than on Xenial and leads to better results,hence better performance. Just a thought -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1638695 Title: Python 2.7.12 performance regression To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/python2.7/+bug/1638695/+subscriptions -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
