#2705: random_matrix with sparse=True is very slow
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Reporter: dfdeshom | Owner: was
Type: enhancement | Status: needs_info
Priority: major | Milestone: sage-4.7.1
Component: linear algebra | Keywords:
Work_issues: | Upstream: N/A
Reviewer: | Author:
Merged: | Dependencies:
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Comment(by ryan):
I noted that even when we specify the density of nonzero entries, a sparse
matrix still takes a significant amount of time.
{{{
sage: time B = random_matrix(ZZ, 2000, density=.05, sparse=True)
Time: CPU 7.02 s, Wall: 8.77 s
sage: time A = random_matrix(ZZ 2000, density=.05, sparse=False)
Time: CPU 1.20 s, Wall: 1.70 s
}}}
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Ticket URL: <http://trac.sagemath.org/sage_trac/ticket/2705#comment:4>
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