#20943: Update a missing important speed improvement for subword complexes
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Reporter: stumpc5 | Owner:
Type: enhancement | Status: new
Priority: major | Milestone: sage-7.3
Component: combinatorics | Resolution:
Keywords: reflection group, coxeter | Merged in:
group, subword complex, days80 |
Authors: Christian Stump | Reviewers:
Report Upstream: N/A | Work issues:
Branch: | Commit:
Dependencies: | Stopgaps:
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Comment (by stumpc5):
For Weyl groups, I get
{{{
sage: W = WeylGroup(['E',7])
sage: %timeit len(W.long_element(as_word=True))
10 loops, best of 3: 98.6 ms per loop
sage: %timeit W.number_of_reflections()
1 loop, best of 3: 208 ms per loop
}}}
and for Coxeter groups, I get
{{{
sage: W = CoxeterGroup(['E',7])
sage: %timeit len(W.long_element(as_word=True))
1 loop, best of 3: 206 ms per loop
sage: %timeit W.number_of_reflections()
1 loop, best of 3: 378 ms per loop
}}}
so I leave the current implementation for those (though this is not as
clean as it should be).
--
Ticket URL: <https://trac.sagemath.org/ticket/20943#comment:2>
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