A smarter(?) package importer.

[Prabhu Ramachandran]

>>>>> "GMcM" == Gordon McMillan <gmcm at hypernet.com> writes:

    GMcM> But sys.modules is a dictionary. It's hashed, not scanned.

Indeed but doesn't the length of the table matter for performance?  I
am no expert here so I'm just asking.

    GMcM> If you *don't* cache failure, you get 3 (4 on Windows)
    GMcM> attempted opens per directory that you could have avoided.

Yes, thats a problem, didn't look hard enough. Thanks for pointing it
out.  Okay I'm convinced of caching now.  Will try to cache it and
post an updated version.

thanks,
prabhu