-- http://www.ironpythoninaction.com On 28 Feb 2010, at 12:19, Floris Bruynooghe <floris.bruynooghe at gmail.com> wrote: > On Sun, Feb 28, 2010 at 02:51:16PM +1300, Greg Ewing wrote: >> Floris Bruynooghe wrote: >>> (But even then I'm not >>> convinced that would double the stat calls for normal users, only >>> for >>> those who only ship .pyc files) >> >> It would increase the number of stat calls for normal >> users by 50%. You would need to look for a .pyc in the >> source directory, then .py in the source directory and >> .pyc in the cache directory. That's compared to two >> stat calls currently, for .py and .pyc. > > Can't it look for a .py file in the source directory first (1st stat)? > When it's there check for the .pyc in the cache directory (2nd stat, > magic number encoded in filename), if it's not check for .pyc in the > source directory (2nd stat + read for magic number check). Or am I > missing a subtlety? > > The problem is doing this little dance for every path on sys.path. Michael >> A solution might be to look for the presence of the >> cache directory, and only look for a .pyc in the source >> directory if there is no cache directory. Testing for >> the cache directory would only have to be done once >> per package and the result remembered, so it would >> add very little overhead. > > That would work too, but I don't understand yet why the .pyc check in > the source directory can't be done last. > > Regards > Floris > > -- > Debian GNU/Linux -- The Power of Freedom > www.debian.org | www.gnu.org | www.kernel.org > _______________________________________________ > Python-Dev mailing list > Python-Dev at python.org > http://mail.python.org/mailman/listinfo/python-dev > Unsubscribe: http://mail.python.org/mailman/options/python-dev/fuzzyman%40voidspace.org.uk
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