#6968: improve _vector_times_matrix
----------------------------+-----------------------------------------------
Reporter: ylchapuy | Owner: was
Type: defect | Status: new
Priority: major | Milestone: sage-4.1.2
Component: linear algebra | Keywords:
Reviewer: | Author: Yann Laigle-Chapuy
Merged: |
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Comment(by ylchapuy):
for the record:
before:
{{{
sage: m=identity_matrix(1000,sparse=True)
sage: v=vector([1]*1000,sparse=True)
sage: time p = v*m
CPU times: user 2.26 s, sys: 0.00 s, total: 2.26 s
Wall time: 2.26 s
}}}
after:
{{{
sage: m=identity_matrix(1000,sparse=True)
sage: v=vector([1]*1000,sparse=True)
sage: time p = v*m
CPU times: user 0.20 s, sys: 0.00 s, total: 0.20 s
Wall time: 0.21 s
}}}
--
Ticket URL: <http://trac.sagemath.org/sage_trac/ticket/6968#comment:1>
Sage <http://sagemath.org/>
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