Hello, I am in the process of verifying this performance regression on a 16.04 Xenial machine using the kernel Linux-4.4.0-38.
I ran a locally compiled python 2.7.12 version built with different versions of GCC, 5.3.1 (current) and 4.8.0 both coming from the Ubuntu archives. The benchmark suite I am using is the pyperformance suite (https://github.com/python/performance), I am running the full test suite, using the following command: $ pyperformance run --python=python2 -o xxx.json According to the latest test run i did using Python 2.7.12/GCC 4.8 (using GCC 5.3.1 as the baseline), 50% of the tests (32/64) have a significant variance in performance from which 19/32 are slower (in times ranging from 5-15%). Just for information, I am comparing results using the following command: $ pyperformance compare python-2.7.12-gcc-5.3.1.json python-2.7.12-gcc-4.8.0.json I am attaching here the current comparison results for analysis. ** Attachment added: "comparison-gcc-5.3.1-gcc-4.8.json" https://bugs.launchpad.net/ubuntu/+source/python2.7/+bug/1638695/+attachment/4778622/+files/comparison-gcc-5.3.1-gcc-4.8.json -- 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
