#10834: faster creation of an ETuple from a list or tuple
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Reporter: pernici | Owner: AlexGhitza
Type: enhancement | Status: new
Priority: major | Milestone: sage-4.6.2
Component: algebra | Keywords:
Author: mario pernici | Upstream: N/A
Reviewer: | Merged:
Work_issues: |
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Comment(by pernici):
With trac_10834_etuple.patch
the creation of an ETuple from a list or tuple is faster
main is Sage-4.6 unpatched; run with processor Intel Core i7 2.80GHz
{{{
main
sage: from sage.rings.polynomial.polydict import ETuple
sage: a = [map(int,[i,1,-5, 3, 1,0]) for i in range(100)]
sage: %timeit map(ETuple,a)
625 loops, best of 3: 130 µs per loop
patch
625 loops, best of 3: 21.5 µs per loop
}}}
The `multi_polynomial_libsingular exponent` method becomes faster;
here is a benchmark taken from ticket #7587
{{{
main
sage: R = PolynomialRing(QQ,100,'x')
sage: p = R.random_element(degree=50,terms=50)
sage: timeit('p.exponents()')
625 loops, best of 3: 595 µs per loop
sage: timeit('p.exponents(as_ETuples=False)')
625 loops, best of 3: 78.3 µs per loop
patch
sage: R = PolynomialRing(QQ,100,'x')
sage: p = R.random_element(degree=50,terms=50)
sage: timeit('p.exponents()')
625 loops, best of 3: 119 µs per loop
sage: timeit('p.exponents(as_ETuples=False)')
625 loops, best of 3: 70.9 µs per loop
}}}
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Ticket URL: <http://trac.sagemath.org/sage_trac/ticket/10834#comment:1>
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