#11589: faster zero matrix creation
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Reporter: malb | Owner: jason, was
Type: enhancement | Status: positive_review
Priority: major | Milestone: sage-4.7.2
Component: linear algebra | Keywords:
Work_issues: | Upstream: N/A
Reviewer: Simon King, Martin Albrecht | Author: Martin Albrecht,
Simon King
Merged: | Dependencies:
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Old description:
> Currently, we perform a matrix copy whenever we create a new zero matrix.
> This is undesirable for two reasons:
>
> * it is slower than creating a new matrix from scratch for some matrices
> * it eats up RAM (we create two instead of one matrix)
>
> See also the discussion on [sage-devel]:
>
> http://groups.google.com/group/sage-
> devel/browse_thread/thread/478fb19ecb724be0
New description:
Currently, we perform a matrix copy whenever we create a new zero matrix.
This is undesirable for two reasons:
* it is slower than creating a new matrix from scratch for some matrices
* it eats up RAM (we create two instead of one matrix)
See also the discussion on [sage-devel]:
http://groups.google.com/group/sage-
devel/browse_thread/thread/478fb19ecb724be0
Apply all three patches.
--
Comment(by jdemeyer):
Replying to [comment:19 SimonKing]:
> If nothing is stated then, I thought, ''all'' patches are to be applied.
For safety, I prefer not to make any such assumptions. In the few cases
where it is unclear (like here), I prefer simply asking.
--
Ticket URL: <http://trac.sagemath.org/sage_trac/ticket/11589#comment:21>
Sage <http://www.sagemath.org>
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