#10628: initialization of matrices from vectors or list of lists can be way
faster
------------------------------+---------------------------------------------
Reporter: mderickx | Owner: jason, was
Type: enhancement | Status: new
Priority: minor | Milestone:
Component: linear algebra | Keywords:
Author: | Upstream: N/A
Reviewer: | Merged:
Work_issues: |
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This is demonstrated by the code below:
{{{
sage: M=MatrixSpace(GF(46337),400)
sage: m=M.random_element()
sage: m1=m.columns()
sage: time M(m1)
CPU times: user 3.06 s, sys: 0.44 s, total: 3.49 s
Wall time: 3.70 s
400 x 400 dense matrix over Finite Field of size 46337
sage: x=[]
sage: time map(x.extend,m1)
CPU times: user 0.81 s, sys: 0.02 s, total: 0.83 s
sage: time M(x)
CPU times: user 0.01 s, sys: 0.00 s, total: 0.01 s
Wall time: 0.01 s
400 x 400 dense matrix over Finite Field of size 46337
sage: M(x)==M(m1)
True
}}}
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Ticket URL: <http://trac.sagemath.org/sage_trac/ticket/10628>
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