#14054: Cythoned UniqueRepresentation
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Reporter: SimonKing | Owner: tbd
Type: enhancement | Status: new
Priority: major | Milestone: sage-5.7
Component: performance | Keywords: cython UniqueRepresentation
Work issues: | Report Upstream: N/A
Reviewers: | Authors: Simon King
Merged in: | Dependencies: #14017
Stopgaps: |
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`UniqueRepresentation` provides a comfortable way to create unique parent
structures, and automatically provides a hash and certain comparison
methods. Problem: It relies on a metaclass, namely `ClasscallMetaclass`
and thus has to be a Python class. That's bad for speed.
Here, I suggest to create a new cdef class `UniqueRepresentation_c` that
provides hash and comparison, and let `UniqueRepresentation` inherit from
it, just adding the classcall method.
The problem is that `UniqueRepresentation` relies on cached_method, and
this decorator had problems to work on methods defined in Cython with
varargs and keywords arguments. That is fixed in #14017, which is thus a
dependency.
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Ticket URL: <http://trac.sagemath.org/sage_trac/ticket/14054>
Sage <http://www.sagemath.org>
Sage: Creating a Viable Open Source Alternative to Magma, Maple, Mathematica,
and MATLAB
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