I've noticed that buildout tests run much slower on Python 3. This surprised people. I was curious how other things run. Pickling is much faster, https://t.co/y2mSHTDneZ. Here's an informal comparison using the wsgiref server.

server.py

# This is taken more or less verbatim from the Python docs for wsgiref

from wsgiref.simple_server import make_server, demo_app

httpd = make_server('', 8000, demo_app)

# Respond to requests until process is killed
httpd.serve_forever()

wsgiref.simple_server.speed.txt

I ran the server redirecting outout to /dev/null on a dual core mac (2.66 Ghz CPU, Snow Leopard).
On the same machine <shrug> I ran ab  with -c9 -n1000

Python version Time/request (ms)
-------------- ----------------
     2.6             1.2
     2.7             1.2
     3.2              .83
     3.3              .77