[Python-Dev] making weakref.ref objects subclassable

[Fred Drake]

On Wednesday 30 June 2004 11:46 pm, Tim Peters wrote:
 > Well, there is no change to gcmodule.c, except for the indirect change in
 > what the PyWeakref_Check() macro expands to.  The risks with weakrefs

The change in the macro expansion is exactly what I was referring to; not a 
source change, but a real change none the less.

 > For reasons given above, I believe gc performance will be virtually
 > unchanged for almost all programs.

That was my conclusion as well.  Empirical evidence with the Zope 3 test suite 
suggests that's right.  If anyone has an application that would be 
meaningfully affected by this change, I'd be rather surprised, and would 
appreciate hearing about it.


  -Fred

-- 
Fred L. Drake, Jr.  <fred at zope.com>
Zope Corporation