#10158: efficiency problem when constructing matrices from list of list
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Reporter: ylchapuy | Owner: jason, was
Type: enhancement | Status: needs_review
Priority: major | Milestone: sage-4.6.1
Component: linear algebra | Keywords:
Author: Yann Laigle-Chapuy | Upstream: N/A
Reviewer: | Merged:
Work_issues: |
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Changes (by newvalueoldvalue):
* status: new => needs_review
* author: => Yann Laigle-Chapuy
Old description:
> this should be fast:
>
> {{{
> sage: M = matrix(ZZ, [[0]*50 for i in range(10^6)])
> }}}
>
> see http://groups.google.com/group/sage-
> support/browse_thread/thread/2f50741b171eaa1a
New description:
this should be fast:
{{{
sage: M = matrix(ZZ, [[0] for i in range(10^6)])
}}}
see http://groups.google.com/group/sage-
support/browse_thread/thread/2f50741b171eaa1a
--
Comment:
Easiest solution provided, even if we could probably do better (see the
thread).
--
Ticket URL: <http://trac.sagemath.org/sage_trac/ticket/10158#comment:4>
Sage <http://www.sagemath.org>
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