#15337: Speed up ulp() method of real_mpfr.pyx
------------------------------------+----------------------------
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:
------------------------------------+----------------------------
Comment (by zimmerma):
I confirm the speedup for normal numbers. Before:
{{{
sage: a=RealField(10**6).one(); timeit('a.ulp()')
625 loops, best of 3: 118 µs per loop
}}}
After:
{{{
sage: a=RealField(10**6).one(); timeit('a.ulp()')
625 loops, best of 3: 7.74 µs per loop
}}}
However for {{{+Inf}}} I notice a slowdown. Before:
{{{
sage: a=RealField(10**6)("Inf"); timeit('a.ulp()')
625 loops, best of 3: 101 ns per loop
}}}
After:
{{{
sage: a=RealField(10**6)("Inf"); timeit('a.ulp()')
625 loops, best of 3: 330 ns per loop
}}}
For {{{-Inf}}} it is faster now, and I see no difference for {{{NaN}}}.
Paul
--
Ticket URL: <http://trac.sagemath.org/ticket/15337#comment:9>
Sage <http://www.sagemath.org>
Sage: Creating a Viable Open Source Alternative to Magma, Maple, Mathematica,
and MATLAB
--
You received this message because you are subscribed to the Google Groups
"sage-trac" group.
To unsubscribe from this group and stop receiving emails from it, send an email
to [email protected].
To post to this group, send email to [email protected].
Visit this group at http://groups.google.com/group/sage-trac.
For more options, visit https://groups.google.com/groups/opt_out.
