#12313: Fix yet another memory leak caused by caching of coercion data
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Reporter: SimonKing | Owner:
Type: defect | Status:
positive_review
Priority: major | Milestone:
sage-5.8
Component: memleak | Resolution:
Keywords: coercion weak dictionary | Work issues:
Report Upstream: N/A | Reviewers: Simon
King, Jean-Pierre Flori, John Perry, Nils Bruin
Authors: Simon King, Jean-Pierre Flori | Merged in:
Dependencies: #715, #11521, #12215, #13746, #13378 | Stopgaps:
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Comment (by nbruin):
Replying to [comment:312 nbruin]:
> I'm afraid the binary operation discovery of the coercion framework
''is'' a memory leak, so the proper solution is probably to give people
good tools to avoid depending on it.
#14058 is making good progress on resolving that issue and depends on this
ticket to have effect.
The speed regression reported in [comment:276] has been diagnosed and
fixed on #13991. This conflicts with work on the much broader scoped
#13605, but that ticket doesn't seem to be going in any time soon, so we
should probably just push #13991 in before it. I think one can even
consider merging #12313 without it.
The speed regression reported on [comment:295] is minor and probably
essential to some degree, because a lookup in a weakly keyed dict is
fundamentally more expensive than in a normal dict. #13387 mitigates the
effects to some extent, but again merging #12313 without it is acceptable
in my opinion.
--
Ticket URL: <http://trac.sagemath.org/sage_trac/ticket/12313#comment:313>
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