#15337: Speed up ulp() method of real_mpfr.pyx
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Reporter: jdemeyer | Owner:
Type: enhancement | Status: positive_review
Priority: minor | Milestone: sage-5.13
Component: basic arithmetic | Resolution:
Keywords: | Merged in:
Authors: Jeroen Demeyer | Reviewers: Paul Zimmermann
Report Upstream: N/A | Work issues:
Branch: | Commit:
Dependencies: | Stopgaps:
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Changes (by zimmerma):
* status: needs_review => positive_review
* reviewer: => Paul Zimmermann
Comment:
I retract part of my comment [comment:17] since it works correctly with
the patch:
{{{
sage: a=RDF(0)
sage: a, a.ulp()
(0.0, 4.94065645841e-324)
sage: b=a.ulp()
sage: b, b.ulp()
(4.94065645841e-324, 4.94065645841e-324)
}}}
and with RR:
{{{
sage: a=RR(0)
sage: a, a.ulp()
(0.000000000000000, 8.50969131174084e-1388255822130839284)
sage: b=a.ulp()
sage: b, b.ulp()
(8.50969131174084e-1388255822130839284,
8.50969131174084e-1388255822130839284)
}}}
Thus the only remaining issue is whether we return self or a new object.
Since this is a minor issue, I give a positive review.
Paul
--
Ticket URL: <http://trac.sagemath.org/ticket/15337#comment:18>
Sage <http://www.sagemath.org>
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