[Python-Dev] importlib quest (original) (raw)
Brett Cannon brett at python.org
Tue Feb 7 19:26:17 CET 2012
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On Mon, Feb 6, 2012 at 14:49, Antoine Pitrou <solipsis at pitrou.net> wrote:
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?
I have not even looked at performance or attempted to profile the code, so I suspect there is room for improvement.
_$ ./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.
I have a benchmark suite for importing modules directly at importlib.test.benchmark, but it doesn't explicitly cover searching far down sys.path. I will see if any of the existing tests implicitly do that and if not add it. -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://mail.python.org/pipermail/python-dev/attachments/20120207/305a1b49/attachment.html>
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