#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: u/stumpc5/20943 | Commit:
Dependencies: | Stopgaps:
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Comment (by stumpc5):
{{{
sage: W = ReflectionGroup(['A',6]); c = list(W.index_set())
sage: Q = c+W.w0.coxeter_sorting_word(c)
sage: %time S = SubwordComplex(Q,W.w0,algorithm="greedy")
}}}
with the fix, I get
{{{
CPU times: user 222 ms, sys: 16.1 ms, total: 238 ms
Wall time: 248 ms
}}}
and without the fix, I get
{{{
CPU times: user 1.35 s, sys: 37.7 ms, total: 1.39 s
Wall time: 1.4 s
}}}
For types E, it becomes obviously much worse.
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Ticket URL: <https://trac.sagemath.org/ticket/20943#comment:4>
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