On Jan 8, 3:28 am, Volker Braun <vbraun.n...@gmail.com> wrote:
> The notebook stuff hurts us twice in import times: First, many modules have
> their path added to sys.path making it longer. Second, the notebook stuff
> is actually imported in a plain commandline Sage session. And the modules
> are pretty slow, for example flaskext.babel is the slowest single module in
> all of Sage.

Doesn't that make it a prime candidate for lazy import? Since it's
basically accessed through a single function, even if the standard
lazy importation is too difficult to get working properly, it should
be easy to get a custom solution in:

Instead of importing all notebook-related stuff, supply a function
'notebook' that imports the right stuff, injects it in the appropriate
namespaces, and overwrites its own binding with the normal "notebook"
function, and then calls it.

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