[Python-Dev] inspect.py very slow under 2.5 (original) (raw)
Nick Coghlan ncoghlan at gmail.com
Wed Sep 6 12:54:45 CEST 2006
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Ralf Schmitt wrote:
The problem seems to originate from the module=getmodule(object) in findsource. If I outcomment that code (or rather do a module=None), things seem to be back as normal. (linecache.getlines has been called with a None module in python 2.4's inspect.py).
It looks like the problem is the call to getabspath() in getmodule(). This happens every time, even if the file name is already in the modulesbyfile cache. This calls os.path.abspath() and os.path.normpath() every time that inspect.findsource() is called.
That can be fixed by having findsource() pass the filename argument to getmodule(), and adding a check of the modulesbyfile cache before the call to getabspath().
Can you try this patch and see if you get 2.4 level performance back on Fernando's test?:
http://www.python.org/sf/1553314
(Assigned to Neal in the hopes of making 2.5rc2)
Cheers, Nick.
-- Nick Coghlan | ncoghlan at gmail.com | Brisbane, Australia
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