#15476: Involutions on NSym and QSym part I
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Reporter: darij | Owner:
Type: enhancement | Status: needs_review
Priority: major | Milestone: sage-6.1
Component: combinatorics | Resolution:
Keywords: ncsf, nsym, qsym, | Merged in:
sage-combinat, symmetric | Reviewers:
functions, compositions | Work issues:
Authors: Darij Grinberg | Commit:
Report Upstream: N/A | 1d9bb8f667abd6b61ad9f38b3e1d791e840eaba3
Branch: | Stopgaps:
public/combinat/ncsf_qsym/involutions-15476|
Dependencies: |
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Comment (by darij):
Hi Travis,
thanks a lot! I don't have git-sage running on this machine and I haven't
had time to check all of your changes so far, but I can confirm that
`_basis_keys` is the right way to go here. BUT please don't use
`Composition([])`:
{{{
sage: %timeit S._basis_keys([])
100000 loops, best of 3: 6.38 us per loop
sage: %timeit Compositions()([])
100000 loops, best of 3: 9 us per loop
sage: %timeit Composition([])
100000 loops, best of 3: 11 us per loop
}}}
Generally, `Composition(something)` does some slow and dirty ducktyping
and should be avoided whenever possible in code.
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Ticket URL: <http://trac.sagemath.org/ticket/15476#comment:4>
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