[Python-Dev] reusing frames

[Jewett, Jim J]

What are the savings from already having (today) "a frame",
as opposed to (proposed) "a frame for this code"?

If much of the work is to create "a frame", then it might
be bad to reserve frames for only the function that created
them.  (i.e., is reinitializing a generic frame twice still
faster than creating a new frame from scratch.)

If it does make sense to create more frames, is there any
reason they couldn't be tied to the code object by a weak
reference?  The reuse could still happen if there was no
garbage collection in between, but code used in initialization
won't keep its frames around forever.  

I suppose further tuning could protect frames from gc level < n, 
or "free" them back to a generic frame pool instead of a generic 
memory pool.

-jJ