#9856: improve `augment` method for sparse matrices
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Reporter: ylchapuy | Owner: jason, was
Type: enhancement | Status: needs_review
Priority: major | Milestone: sage-4.6
Component: linear algebra | Keywords:
Author: Yann Laigle-Chapuy | Upstream: N/A
Reviewer: | Merged:
Work_issues: |
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Changes (by ylchapuy):
* status: needs_info => needs_review
Comment:
It's a speed improvement. Here's the example:
{{{
sage: m = identity_matrix(QQ, 1000, sparse=True)
sage: timeit('m.augment(m)')
}}}
BEFORE
{{{
5 loops, best of 3: 368 ms per loop
}}}
AFTER
{{{
625 loops, best of 3: 1.2 ms per loop
}}}
And we are not loosing anything for small cases:
{{{
sage: m = identity_matrix(QQ, 5, sparse=True)
sage: timeit('m.augment(m)')
}}}
BEFORE
{{{
625 loops, best of 3: 198 µs per loop
}}}
AFTER
{{{
625 loops, best of 3: 197 µs per loop
}}}
--
Ticket URL: <http://trac.sagemath.org/sage_trac/ticket/9856#comment:3>
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