#11657: the vector(...) function is extremely slow
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Reporter: was | Owner: jason, was
Type: defect | Status: needs_review
Priority: minor | Milestone: sage-4.7.2
Component: linear algebra | Keywords:
Work_issues: | Upstream: N/A
Reviewer: | Author: Rob Beezer
Merged: | Dependencies:
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Comment(by was):
Your examples above, with large n, are probably unfair, since they are
much less likely. I'm still concerned by how very slow this is with
smaller n, e.g., even with your patch:
{{{
sage: timeit('vector(ZZ,50)')
625 loops, best of 3: 44.3 µs per loop
sage: timeit('(ZZ^50).zero_vector()')
625 loops, best of 3: 9.58 µs per loop
}}}
I'm posting a new version of your patch that is pretty much "optimal":
{{{
sage: timeit('vector(ZZ,50)')
625 loops, best of 3: 9.7 µs per loop
}}}
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Ticket URL: <http://trac.sagemath.org/sage_trac/ticket/11657#comment:3>
Sage <http://www.sagemath.org>
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