#9887: slow coercion from integer ring to integer mod ring
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Reporter: dmharvey | Owner: tbd
Type: defect | Status: positive_review
Priority: major | Milestone: sage-5.11
Component: performance | Resolution:
Keywords: sd51 | Merged in:
Authors: | Reviewers:
Report Upstream: N/A | Work issues:
Branch: | Dependencies:
Stopgaps: |
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Changes (by AlexGhitza):
* status: needs_info => positive_review
* reviewer: PatchBot =>
* dependencies: #11900 =>
* work_issues: needs rebase =>
* keywords: => sd51
Comment:
I second the request to close the ticket. On sage-5.10:
{{{
sage: R = Integers(3^20)
sage: u = Integer(2)
sage: %timeit("z = R(u)")
10000000 loops, best of 3: 24.6 ns per loop
sage: %timeit("z = ZZ(u)")
10000000 loops, best of 3: 24.5 ns per loop
}}}
In other words, putting u into R takes the same time as putting u into ZZ
(where it is already). It shouldn't be possible to do any better.
I'll tag this as "positive review" to bring it to the release manager's
attention.
--
Ticket URL: <http://trac.sagemath.org/ticket/9887#comment:13>
Sage <http://www.sagemath.org>
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