#7547: improve has_multiple_edges
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Reporter: ylchapuy | Owner: rlm
Type: enhancement | Status: needs_review
Priority: major | Milestone: sage-4.3
Component: graph theory | Keywords:
Work_issues: | Author: Yann Laigle-Chapuy
Upstream: N/A | Reviewer:
Merged: |
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Changes (by ylchapuy):
* cc: ncohen (added)
* status: new => needs_review
Old description:
> It seems to be the main bottleneck in graph plotting!
> This patch cuts down by 30% the time for `sage -t graph.py` on my
> machine... (and doctests of course still pass)
New description:
This patch cuts down by 30% the time for sage -t graph.py on my machine...
(and doctests of course still pass)
--
Comment:
For the record:
{{{
sage: P = graphs.PetersenGraph()
sage: D = graphs.DodecahedralGraph()
sage: L = D.lexicographic_product(P)
sage: L.allow_multiple_edges(True)
sage: time L.has_multiple_edges()
}}}
Before: Wall time: 39.56 s
After: Wall time: 19.32 s
I hope I did no mistake, it's 4 a.m here...
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Ticket URL: <http://trac.sagemath.org/sage_trac/ticket/7547#comment:1>
Sage <http://www.sagemath.org>
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