#11332: 65x penalty in performance for using float instead of RealNumber
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Reporter: pang | Owner: burcin
Type: defect | Status: needs_review
Priority: major | Milestone: sage-duplicate/invalid/wontfix
Component: | Resolution:
symbolics | Merged in:
Keywords: float, | Reviewers:
RealNumber | Work issues:
Authors: | Commit:
Report Upstream: N/A | Stopgaps:
Branch: |
Dependencies: |
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Comment (by vdelecroix):
Replying to [comment:8 mmezzarobba]:
> Fixed?
>
> {{{
> sage: sage: x=random()
> sage: sage: y=RealNumber(x)
> sage: sage: z=RDF(x)
> sage: sage: timeit('exp(x)')
> 625 loops, best of 3: 17.7 µs per loop
> sage: sage: timeit('exp(y)')
> 625 loops, best of 3: 5.9 µs per loop
> sage: sage: timeit('exp(z)')
> 625 loops, best of 3: 2.29 µs per loop
> }}}
Half
{{{
sage: x = random()
sage: timeit('exp(x)', number=50000)
50000 loops, best of 3: 8.15 µs per loop
sage: from math import exp as math_exp
sage: timeit('math_exp(x)', number=50000)
50000 loops, best of 3: 290 ns per loop
}}}
just 30x slower. Better than the 65x that was reported for the difference
between `float` and `RR`.
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Ticket URL: <http://trac.sagemath.org/ticket/11332#comment:9>
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