#12853: Severe slow-down in elliptic_curve integral_points()
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Reporter: jdemeyer | Owner: tbd
Type: defect | Status: new
Priority: blocker | Milestone: sage-5.0
Component: performance | Resolution:
Keywords: | Work issues:
Report Upstream: N/A | Reviewers:
Authors: | Merged in:
Dependencies: | Stopgaps:
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Old description:
> Consider the file
> {{{
> E = EllipticCurve([-879984,319138704])
> P1 = E.point((540,1188))
> P2 = E.point((576,1836))
> P3 = E.point((468,3132))
> P4 = E.point((612,3132))
> P5 = E.point((432,4428))
> t = cputime()
> pts = E.integral_points([P1,P2,P3,P4,P5])
> print "Time:", cputime(t)
> }}}
>
> With sage-4.8, this takes about 35 seconds. With sage-5.0.beta10, the
> same test takes about 50 seconds.
>
> According to Volker Braun, this is caused by #11599.
New description:
Consider the file
{{{
E = EllipticCurve([-879984,319138704])
P1 = E.point((540,1188))
P2 = E.point((576,1836))
P3 = E.point((468,3132))
P4 = E.point((612,3132))
P5 = E.point((432,4428))
t = cputime()
pts = E.integral_points([P1,P2,P3,P4,P5])
print "Time:", cputime(t)
}}}
With sage-4.8, this takes about 35 seconds. With sage-5.0.beta10, the
same test takes about 50 seconds.
This is caused by #11599.
--
Comment (by jdemeyer):
I can confirm that this is caused by #11599. When applying #11599 to
sage-5.0.beta3, I get the same slowdown.
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Ticket URL: <http://trac.sagemath.org/sage_trac/ticket/12853#comment:2>
Sage <http://www.sagemath.org>
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