At 01:31 PM 1/18/2008 -0500, Jim Fulton wrote: >On Jan 18, 2008, at 1:04 PM, Phillip J. Eby wrote: > >>At 12:50 PM 1/18/2008 -0500, Jim Fulton wrote: >> >>>On Jan 18, 2008, at 12:32 PM, Phillip J. Eby wrote: >>> >>>>At 10:13 AM 1/18/2008 -0500, Jim Fulton wrote: >>>... >>> >>>Can you briefly explain or provide a link to something that explains >>>the performance improvement? >> >>Fewer directories on sys.path = better import performance, compared >>to individually putting a series of .egg directories on sys.path. > >Ah, I didn't understand what you meant by "unzip the contents to the >target directory". > >So the idea is that you'd merge the contents of multiple zip files >into a single "target" directory.
Correct. >This seems rather messy to me. Well, it's what we all used to do before eggs came along, and what most packaging systems still do now. :) > It doesn't appear to be compatible >with multi-version installs. It *can* be compatible, with certain limitations. > Also, if a newer egg version removes a >file, the removed file will be left installed after an upgrade. If >two eggs provide the same file, files will be overridden. Admittedly, >this is a somewhat pathological case, but the overriding seems to >compound the pathology. Again, this is all true without eggs now. Clearly, eggs have spoiled you tremendously. ;-) Seriously, though, if buildout is tracking what files get installed or overwritten during unzipping, you can manage all of this, just as you presumably do for any other sort of installation recipe, no? >As described in a separate thread, I'm going to add an option to >buildout so buildout users can explicitly define a directory to use as >a setuptools cache. In that case, zip-safe eggs can remain zipped >even if they have extensions. If you want to be really safe/careful, you can pre-extract the eggs to the cache, thereby avoiding any runtime permission problems. _______________________________________________ Distutils-SIG maillist - Distutils-SIG@python.org http://mail.python.org/mailman/listinfo/distutils-sig
