#10963: More functorial constructions
-------------------------------------+-------------------------------------
Reporter: nthiery | Owner: stumpc5
Type: enhancement | Status: needs_work
Priority: major | Milestone:
Component: categories | Resolution:
Keywords: | Merged in:
Authors: Nicolas M. Thiéry | Reviewers: Simon King
Report Upstream: N/A | Work issues: Reduce startup time
Branch: | by 5%. Avoid "recursion depth
Dependencies: #11224, #8327, | exceeded (ignored)".
#10193, #12895, #14516, #14722, | Commit:
#13589, #14471 | Stopgaps:
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Comment (by SimonKing):
Note that for the join, we are using a `WeakValueDictionary`, and with
your patch we are making increased use of joins. Could this be the source
of trouble?
But to my surprise, with a `WeakValueDictionary`, one can not get the same
error (here, of course, we need to delete the first value, not the first
key):
{{{
sage: class A: pass
sage: M = weakref.WeakValueDictionary()
sage: a = A()
....: prev = a
....: for i in range(1000):
....: newA = A()
....: M[newA] = prev
....: prev = newA
....:
sage: len(M)
1000
sage: del a
sage: len(M)
0
}}}
--
Ticket URL: <http://trac.sagemath.org/ticket/10963#comment:95>
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