#5974: [with patch; needs review] the generic linear_combination_of_rows and
linear_combination_of_columns functions for matrices are very stupidly
slotch
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Reporter: was | Owner: was
Type: defect | Status: new
Priority: major | Milestone: sage-4.0
Component: linear algebra | Keywords:
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Behold. By replacing about 40 confusing lines by 2 trivial lines, I get a
*speedup* by more than a factor of 10!
{{{
BEFORE:
sage: A = random_matrix(QQ,50)
sage: v = [1..50]
sage: timeit('A.linear_combination_of_rows(v)')
125 loops, best of 3: 5.48 ms per loop
AFTER:
sage: A = random_matrix(QQ,50)
sage: v = [1..50]
sage: timeit('A.linear_combination_of_rows(v)')
625 loops, best of 3: 503 µs per loop
}}}
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Ticket URL: <http://trac.sagemath.org/sage_trac/ticket/5974>
Sage <http://sagemath.org/>
Sage - Open Source Mathematical Software: Building the Car Instead of
Reinventing the Wheel
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