Here's a ticket where we can keep talking about this:

http://www.sqlalchemy.org/trac/ticket/2720

(here's the py3k ticket also: http://www.sqlalchemy.org/trac/ticket/2161)

note that SQLAlchemy 0.9 will no longer use 2to3, and will by Python 2.6->3.3 
in place.    The enhancement here is targeted at 0.9 which is currently in the 
rel_0_9 branch.   

as for the __slots__ thing, that's a separate issue.    if your patch doesn't 
break tests we can set that for 0.9 as well, I doubt anyone is subclassing 
InstanceState, though I'd want to see what the speedup is with that.   



On May 6, 2013, at 1:37 PM, Claudio Freire <klaussfre...@gmail.com> wrote:

> On Mon, May 6, 2013 at 2:20 PM, Claudio Freire <klaussfre...@gmail.com> wrote:
>> On Mon, May 6, 2013 at 1:50 PM, Michael Bayer <mike...@zzzcomputing.com> 
>> wrote:
>>> that's a lot of effort there.  How confident are you that memory and 
>>> references are handled correctly in the .c code?
>> 
>> Quite. It's not my first C extension. But, truly, C is complex.
> 
> 
> And as I write this... I find an... issue (not leak, but not good
> reference management either). Sorry.
> 
> Feel free to gauge cost-benefit here. I'll think about pyrex too.
> 
> Have in mind that I'll be using SQLAlchemy for years to come (or
> expect to). I don't think I shall withdraw support in the short term,
> but an oracle I am not.
> 
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