#11900: Serious regression caused by #9138
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Reporter: SimonKing | Owner: tbd
Type: defect | Status: needs_work
Priority: major | Milestone: sage-4.7.3
Component: performance | Keywords: categories regression
Work_issues: fix doctests | Upstream: N/A
Reviewer: | Author: Simon King
Merged: | Dependencies: #9138 #11911
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Comment(by SimonKing):
The doctest failures will be sufficiently easy to fix.
It will hardly be possible to have #9138 without any regression: After
all, the initialisation of a good category takes its time. Therefore, I am
trying to improve various frequently used category operations
(is_subcategory, all_super_categories, testing ring-ness and field-ness,
parent class construction) so that in the end the regression is tolerable.
In addition, I am now trying to look at the concrete examples. I still see
that in the `prove_BSD` example the same polynomial rings are constructed
repeatedly. So far, I am mystified: Looking at the code, garbage
collection of the polynomial ring should simply not happen.
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Ticket URL: <http://trac.sagemath.org/sage_trac/ticket/11900#comment:61>
Sage <http://www.sagemath.org>
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