> I don't think Serhiy's patch should be blocked by a larger issue.
> I suppose you could rebase easily over his changes.

Where rebase=undo, sure.  The changes for issue3132 are pretty
extensive (the basic data structures are changed).  And as mentioned
in msg165892, msg188840, and msg125617 I have already proposed and
implemented this optimization many months back.

If we feel that this optimization is really critical, then I agree
let's not hold it up and I will just work around it with my patch for
issue3132.  I don't see it as that critical, but I understand that the
PEP 3118 changes are dragging on and this optimization might be important
for some now.