#12121: floor/ceil can be very slow at integral values
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Reporter: dsm | Owner: AlexGhitza
Type: defect | Status: needs_review
Priority: major | Milestone: sage-7.1
Component: basic arithmetic | Resolution:
Keywords: | Merged in:
Authors: Vincent Delecroix | Reviewers:
Report Upstream: N/A | Work issues:
Branch: | Commit:
u/vdelecroix/12121 | 688ebfa077f09ee9a2bc988833ddd4f0fc65a4a1
Dependencies: | Stopgaps:
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Comment (by vdelecroix):
Replying to [comment:25 rws]:
> Be aware you might be using symbolics when doing bool( == ). To not end
up with surprises you might want to break out the actual functionality you
need out of `Expression.__nonzero__` or review #16397 and use `cmp`.
You mean that there is no way to check that `expr1 == expr2`? I do not
want to copy/paste anything from other place. If testing equality is not
available, there is a big problem.
Using `cmp` for that purpose is a bad idea. The purpose of `cmp` in Python
2 is to sort things out. Not to compare.
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Ticket URL: <http://trac.sagemath.org/ticket/12121#comment:27>
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