#10963: More functorial constructions
-------------------------------------+-------------------------------------
Reporter: nthiery | Owner: stumpc5
Type: enhancement | Status: needs_work
Priority: major | Milestone: sage-5.13
Component: categories | Resolution:
Keywords: days54 | Merged in:
Authors: Nicolas M. Thiéry | Reviewers: Simon King, Frédéric
Report Upstream: N/A | Chapoton
Branch: | Work issues:
public/ticket/10963 | Commit:
Dependencies: #11224, #8327, | 80d55fe6f2c1ed2496a02cab4ae0db4cb31a7b06
#10193, #12895, #14516, #14722, | Stopgaps:
#13589, #14471, #15069, #15094, |
#11688, #13394 |
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Comment (by nthiery):
Replying to [comment:171 nbruin]:
> Replying to [comment:169 vbraun]:
> > How about we just create our own trashcan for weakref callbacks?
> > ...
> It's easier than that. You can take the same approach as in #15367:
> ..
> Instead of deleting a bare key, we're deleting a list containing the
key. Since python lists participate in the trashcan, we get to borrow the
trashcan count from there.
>
> There's a slight cost to this approach: we're allocating a list only to
delete it, but that is a very small cost indeed (and a cost we'd incur
with our home-rolled trashcan too), and we still get to benefit from all
the other performance tunings that have gone into python's trashcan.
I am glad to hear that there seems to be an easy solution. I can't
wait to see it implemented, tested, reviewed, merged! And then see
#10963 merged finally!
Whoever participates to this will get a triple beer from me
(chocolates work too :-)) at the next occasion! Who's in?
Cheers,
Nicolas
--
Ticket URL: <http://trac.sagemath.org/ticket/10963#comment:174>
Sage <http://www.sagemath.org>
Sage: Creating a Viable Open Source Alternative to Magma, Maple, Mathematica,
and MATLAB
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