[Speed] Ubuntu 16.04 speed issues

[Victor Stinner]

Hello,

> The OpenStack-Ansible project has noticed that performance on Ubuntu 16.04 is quite significantly slower than on 14.04.
> At the moment it's looking like *possibly* a GCC related bug.

Is it exactly the same Python version? What is the full version?

Try to get compiler flags:

python2 -c 'import sysconfig; print(sysconfig.get_config_var("CFLAGS"))'


2016-11-10 18:01 GMT+01:00 Paul Graydon <paul at paulgraydon.co.uk>:
> I've a niggling feeling there was discussion about some performance drops on 16.04 not all that long ago, but I'm
> completely failing to find it in my emails.

You might run https://github.com/python/performance on Ubuntu 14.04
and 16.04 on the same hardware, or at least similar hardware, to
compare performance.

Victor