#18194: Speedup of calculation of Macdonald H and Ht bases
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Reporter: zabrocki | Owner:
Type: enhancement | Status: needs_review
Priority: minor | Milestone: sage-6.7
Component: combinatorics | Resolution:
Keywords: sf, days67, sage- | Merged in:
combinat | Reviewers: Travis Scrimshaw
Authors: Mike Zabrocki | Work issues:
Report Upstream: N/A | Commit:
Branch: | 0a09d0f615166b8f65af971a61805663e81f3ff2
public/combinat/mac_speedup-18194 | Stopgaps:
Dependencies: |
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Comment (by zabrocki):
Well I see some clever ways that you have added a bit of efficiency, but
unfortunately I am not seeing a speedup on at least one computation. On
59394c6
{{{
sage: s = SymmetricFunctions(QQ['q','t'].fraction_field()).s()
sage: %time s[3,3,3,3].nabla()
CPU times: user 4min 8s, sys: 512 ms, total: 4min 8s
Wall time: 4min 8s
}}}
on current branch
{{{
sage: %time s[3,3,3,3].nabla()
CPU times: user 4min 29s, sys: 454 ms, total: 4min 29s
Wall time: 4min 29s
}}}
This computation uses only the `Ht` basis (it does a conversion to the
`Ht`, multiply by eigenvalue, then from `Ht` to `s`).
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Ticket URL: <http://trac.sagemath.org/ticket/18194#comment:43>
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