#13589: Controlling C3 to solve once for all the Method Resolution Order issues
for
category classes
----------------------------------------------------------+-----------------
Reporter: nthiery | Owner:
nthiery
Type: defect | Status:
needs_review
Priority: major | Milestone:
sage-5.11
Component: categories | Resolution:
Keywords: method resolution order, C3 | Work issues:
Report Upstream: N/A | Reviewers:
Simon King, Florent Hivert
Authors: Nicolas M. Thiéry | Merged in:
Dependencies: #12894, #12876, #11935, #12895, #10193 | Stopgaps:
----------------------------------------------------------+-----------------
Comment (by SimonKing):
We have to save a total of about 70 ms in 93 function calls. This is not
much, and perhaps it could be obtained by cythoning the computation of
_cmp_key.
Also, you do
{{{
assert not isinstance(self, JoinCategory)
}}}
and later comment
{{{
for cat in self._super_categories: # not self.super_categories() to avoid
join categories!
}}}
So, is the assertion not needed, after all?
--
Ticket URL: <http://trac.sagemath.org/sage_trac/ticket/13589#comment:57>
Sage <http://www.sagemath.org>
Sage: Creating a Viable Open Source Alternative to Magma, Maple, Mathematica,
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