#19688: Much fast divisors using PARI divisorsu
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Reporter: vdelecroix | Owner:
Type: enhancement | Status: new
Priority: major | Milestone: sage-6.10
Component: basic arithmetic | Keywords:
Merged in: | Authors: Vincent Delecroix
Reviewers: | Report Upstream: N/A
Work issues: | Branch:
Commit: | Dependencies:
Stopgaps: |
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Using PARI we get a huge speedup for integer of small range. With the
branch applied
{{{
sage: %timeit 100.divisors(method='pari')
1000000 loops, best of 3: 818 ns per loop
sage: %timeit 100.divisors(method='sage')
100000 loops, best of 3: 14.1 µs per loop
}}}
As it is critical for some application, it is also available included as a
`cpdef` function named `_pari_divisors_small`.
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Ticket URL: <http://trac.sagemath.org/ticket/19688>
Sage <http://www.sagemath.org>
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