#15337: Speed up ulp() method of real_mpfr.pyx
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Reporter: jdemeyer | Owner:
Type: enhancement | Status: needs_review
Priority: minor | Milestone: sage-5.13
Component: basic arithmetic | Resolution:
Keywords: | Merged in:
Authors: Jeroen Demeyer | Reviewers:
Report Upstream: N/A | Work issues:
Branch: | Commit:
Dependencies: | Stopgaps:
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Comment (by jdemeyer):
The slowdown for `+Inf` was because we used to simply return `self` in
that case. My code instead always creates a new number, so the slowdown
you see is the overhead of creating a new number. However, I personally
prefer the current code, which is simpler but not optimal for `+Inf`
(which should be a rare case anyway). I don't think it is justified to
make the code more complicated to deal with the case of `+Inf` in a
special way.
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Ticket URL: <http://trac.sagemath.org/ticket/15337#comment:10>
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