#12121: floor/ceil can be very slow at integral values
-------------------------------------+-------------------------------------
Reporter: dsm | Owner: AlexGhitza
Type: defect | Status: needs_work
Priority: major | Milestone: sage-7.2
Component: basic arithmetic | Resolution:
Keywords: | Merged in:
Authors: Vincent Delecroix | Reviewers: Marc Mezzarobba
Report Upstream: N/A | Work issues:
Branch: | Commit:
u/vdelecroix/12121 | 602e5158c5f37c6900a1dee8e27a228114af1319
Dependencies: | Stopgaps:
-------------------------------------+-------------------------------------
Comment (by nbruin):
You may be interested in #20624. It looks like implementing `_evalf_` by
calling `_eval_` is VERY bad: currently evaluation of `ceil` may lead to
running out the python call stack before doing anything useful. Obviously,
this takes some time. Inheriting from `BuiltinFunction` is a real bugtrap:
its init reassigns a whole bunch of methods.
--
Ticket URL: <http://trac.sagemath.org/ticket/12121#comment:50>
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 https://groups.google.com/group/sage-trac.
For more options, visit https://groups.google.com/d/optout.
