#15706: Graph built from their edges are simple by default
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Reporter: ncohen | Owner:
Type: enhancement | Status: positive_review
Priority: major | Milestone: sage-6.4
Component: graph theory | Resolution:
Keywords: | Merged in:
Authors: Nathann Cohen | Reviewers: Dima Pasechnik
Report Upstream: N/A | Work issues:
Branch: | Commit:
public/ticket/15706 | 7c69f250922b0373de62e16b16baaab7f8b2fd32
Dependencies: #15704 | Stopgaps:
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Comment (by ncohen):
Besides, just for your own information:
{{{
sage: g = Graph()
sage: edges = list(combinations(range(1000),2))
sage: %time g.add_edges(edges)
CPU times: user 992 ms, sys: 44 ms, total: 1.04 s
Wall time: 989 ms
sage: g = Graph()
sage: %time for e in edges: g.add_edge(e)
CPU times: user 1.8 s, sys: 44 ms, total: 1.84 s
Wall time: 1.79 s
}}}
This, because `add_edge(u,v)`, `add_edge(u,v,l)`, `add_edge((u,v))`,
`add_edge((u,v,l))` are all valid, and that deciding which should be used
takes time, at each `add_edge` call.
Nathann
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Ticket URL: <http://trac.sagemath.org/ticket/15706#comment:44>
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