#10553: Diamond bracket operators are terribly slow
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Reporter: mderickx | Owner: craigcitro
Type: enhancement | Status: needs_review
Priority: major | Milestone: sage-4.7
Component: modular forms | Keywords: diamond operator
Author: Maarten Derickx, David Loeffler | Upstream: N/A
Reviewer: | Merged:
Work_issues: |
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Changes (by newvalueoldvalue):
* keywords: => diamond operator
* milestone: => sage-4.7
* author: => Maarten Derickx, David Loeffler
Comment:
Depends on #10451
Apply trac_10553.patch
With #10451 installed it's just a case of adding "check=False" in one line
of code. Hence the new patch. Obligatory timings:
{{{
# Before
sage: S = ModularSymbols(Gamma1(97),sign=1).cuspidal_submodule()
sage: time S.diamond_bracket_matrix(3)
CPU times: user 62.15 s, sys: 0.03 s, total: 62.18 s
Wall time: 62.17 s
345 x 345 dense matrix over Rational Field
}}}
{{{
# After
sage: S = ModularSymbols(Gamma1(97),sign=1).cuspidal_submodule()
sage: time S.diamond_bracket_matrix(3)
CPU times: user 7.40 s, sys: 0.02 s, total: 7.42 s
Wall time: 7.42 s
345 x 345 dense matrix over Rational Field
}}}
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Ticket URL: <http://trac.sagemath.org/sage_trac/ticket/10553#comment:5>
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