#12476: Little fixes for a major speedup of join/meet matrices for
FiniteLatticePoset
-------------------------------------------------+--------------------------
Reporter: hivert | Owner:
sage-combinat
Type: defect | Status:
positive_review
Priority: major | Milestone: sage-5.0
Component: combinatorics | Keywords: poset,
matrix, Cernay2012
Work_issues: | Upstream: N/A
Reviewer: Florent Hivert, Nicolas M. Thiéry | Author: Florent
Hivert, Nathann Cohen
Merged: | Dependencies: #10988
-------------------------------------------------+--------------------------
Changes (by nthiery):
* dependencies: => #10988
Old description:
> Before
> {{{
> sage: %time posets.BooleanLattice(8)
> CPU times: user 10.42 s, sys: 0.01 s, total: 10.43 s
> Wall time: 10.51 s
> Finite lattice containing 256 elements
> }}}
> After
> {{{
> sage: %time posets.BooleanLattice(8)
> CPU times: user 0.75 s, sys: 0.01 s, total: 0.76 s
> Wall time: 0.84 s
> Finite lattice containing 256 elements
> }}}
New description:
Before
{{{
sage: %time posets.BooleanLattice(8)
CPU times: user 10.42 s, sys: 0.01 s, total: 10.43 s
Wall time: 10.51 s
Finite lattice containing 256 elements
}}}
After
{{{
sage: %time posets.BooleanLattice(8)
CPU times: user 0.75 s, sys: 0.01 s, total: 0.76 s
Wall time: 0.84 s
Finite lattice containing 256 elements
}}}
Apply: [attachment:trac_12476-lattice_join_matrix_speedup-fh.patch]
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Ticket URL: <http://trac.sagemath.org/sage_trac/ticket/12476#comment:3>
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