Performance of individual vs. total import
Question: I've started to obsess about imports relative to instance spin-up latency. Got
me thinking...

I use a separate, central kinds.py module for all my Model.db class
definitions. Different handler/task modules will import the classes they use
from it. Was wondering about the tradeoffs of doing a global "import kinds"
vs. a series of "from kinds import ...". If the entire kinds.py is not needed,
is it faster to do the individual imports? Or, is the process python/GAE uses
to work through the individual imports going to be faster? Maybe some break
even point at n% of the global total exists?


Answer: There is no difference in speed between these two options. Python has to parse
the whole file anyway.

In fact strictly speaking, there might even be a difference in the other
direction: with `from kinds import ...`, Python would have to create and
assign each reference, which adds a (tiny, tiny) load.

