[Python-Dev] importlib quest

[Antoine Pitrou]

On Mon, 6 Feb 2012 09:57:56 -0500
Brett Cannon <brett at python.org> wrote:
> Thanks for any help people can provide me on this now 5 year quest to get
> this work finished.

Do you have any plan to solve the performance issue?

$ ./python -m timeit -s "import sys; mod='struct'" \
  "__import__(mod); del sys.modules[mod]"
10000 loops, best of 3: 75.3 usec per loop
$ ./python -m timeit -s "import sys; mod='struct'; from importlib import __import__" \
  "__import__(mod); del sys.modules[mod]"
1000 loops, best of 3: 421 usec per loop

Startup time is already much worse in 3.3 than in 2.7. With such a
slowdown in importing fresh modules, applications using many batteries
(third-party or not) will be heavily impacted.

Regards

Antoine.