At 03:48 PM 10/2/2006 -0700, Brett Cannon wrote:
>On 10/2/06, Paul Moore <<mailto:[EMAIL PROTECTED]>[EMAIL PROTECTED]> >wrote: >>On 10/2/06, Phillip J. Eby >><<mailto:[EMAIL PROTECTED]>[EMAIL PROTECTED]> wrote: >>[SNIP] >> > I'm surprised, however, that you think working on this in C is going to be >> > *less* time than it would take to simply replace __import__ with a Python >> > function that reimplements PEP 302... >> >>That I do agree with. There's a bootstrapping issue (you can't import >>the Python module that does all this without using a C-coded import >>mechanism) but that should be resolvable. > >This is why I asked for input from people on which would take less >time. Almost all the answers I got was that the the C code was delicate >but that it was workable. Several people said they wished for a Python >implementation, but hardly anyone said flat-out, "don't waste your time, >the Python version will be faster to do". > >As for the bootstrapping, I am sure it is resolvable as well. There are >several ways to go about it that are all tractable. When I implemented the PEP 302 fix for the import speedups, I basically prototyped it using Python code that got loaded prior to 'site.py'. Once I had the Python version solid, I converted it to a C type via straightforward code transcription. That's pretty much the route I would follow for this too, although of course "freezing" the Python version into C code is also an option, since there's not much performance benefit to be had from a C translation, except for two parts of __import__: the part that checks sys.modules to shortcut the process, and the part that runs after the target module has been loaded or found. Aside from this "fast path" part of __import__, any additional interpretation overhead will probably be dwarfed by I/O considerations. _______________________________________________ Python-Dev mailing list Python-Dev@python.org http://mail.python.org/mailman/listinfo/python-dev Unsubscribe: http://mail.python.org/mailman/options/python-dev/archive%40mail-archive.com
