#10963: More functorial constructions
-------------------------------------+-------------------------------------
Reporter: nthiery | Owner: stumpc5
Type: enhancement | Status: needs_work
Priority: major | Milestone: sage-6.1
Component: categories | Resolution:
Keywords: days54 | Merged in:
Authors: Nicolas M. Thiéry | Reviewers: Simon King, Frédéric
Report Upstream: N/A | Chapoton
Branch: | Work issues: Detect and fix
public/ticket/10963 | Heisenbugs
Dependencies: #11224, #8327, | Commit:
#10193, #12895, #14516, #14722, | 5ccf253b17c151d8e773037ac634a64f84f03075
#13589, #14471, #15069, #15094, | Stopgaps:
#11688, #13394, #15150, #15506 |
-------------------------------------+-------------------------------------
Comment (by SimonKing):
I tried to trace how often the lazy class attribute
`_base_category_class_and_axiom` is called for each class. Note that (as a
lazy attribute) it should be called only once!! This is how often it is
called:
{{{
sage.categories.finite_semigroups.FiniteSemigroups: 76,
sage.categories.sets_cat.Sets.Infinite: 1,
sage.categories.commutative_rings.CommutativeRings: 82,
sage.categories.distributive_magmas_and_additive_magmas.AdditiveAssociative.AdditiveCommutative:
1,
sage.categories.distributive_magmas_and_additive_magmas.DistributiveMagmasAndAdditiveMagmas.AdditiveAssociative:
1,
sage.categories.additive_magmas.AdditiveMagmas.AdditiveCommutative: 1,
sage.categories.additive_magmas.AdditiveUnital.AdditiveInverse: 1,
sage.categories.additive_magmas.AdditiveMagmas.AdditiveUnital: 1,
sage.categories.distributive_magmas_and_additive_magmas.AdditiveCommutative.AdditiveUnital:
1,
sage.categories.magmas.Magmas.Commutative: 1,
sage.categories.distributive_magmas_and_additive_magmas.AdditiveUnital.Associative:
1,
sage.categories.magmas.Unital.Inverse: 1,
sage.categories.magmas.Magmas.Unital: 1,
sage.categories.distributive_magmas_and_additive_magmas.AdditiveUnital.AdditiveInverse:
1,
sage.categories.commutative_algebras.CommutativeAlgebras: 81,
sage.categories.finite_fields.FiniteFields: 82,
sage.categories.finite_enumerated_sets.FiniteEnumeratedSets: 82,
sage.categories.finite_monoids.FiniteMonoids: 76,
sage.categories.finite_sets.FiniteSets: 79,
sage.categories.unital_algebras.UnitalAlgebras.WithBasis: 1,
sage.categories.infinite_enumerated_sets.InfiniteEnumeratedSets: 81
}}}
That's bad.
--
Ticket URL: <http://trac.sagemath.org/ticket/10963#comment:251>
Sage <http://www.sagemath.org>
Sage: Creating a Viable Open Source Alternative to Magma, Maple, Mathematica,
and MATLAB
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