[Distutils] [Catalog-sig] Why so many zc.buildout versions?

["Martin v. Löwis"]

> No, it will mitigate the current issue somewhat, but it will still  
> involve multiple requests per package, while a simpler index  
> structure would allow a single request per package.

I don't understand. If setuptools would always look
/pypi/package/version first, it would immediately find the right
page if that version is indeed stored in the cheeseshop.

Why would that require multiple requests per package?

Regards,
Martin