#10963: More functorial constructions
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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, | a410d05b692eead348214b0378dfc78113a3bf5a
#10193, #12895, #14516, #14722, | Stopgaps:
#13589, #14471, #15069, #15094, |
#11688, #13394 |
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Comment (by nthiery):
Replying to [comment:174 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.
Nils, if you see precisely how to handle this, pleeeeeeaaaaase
proceed! I have created #15506 for this issue.
Cheers,
Nicolas
--
Ticket URL: <http://trac.sagemath.org/ticket/10963#comment:180>
Sage <http://www.sagemath.org>
Sage: Creating a Viable Open Source Alternative to Magma, Maple, Mathematica,
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