#13378: Do not cache the non-existence of coerce/convert map too often, and do
not
pretend that there is a conversion where it doesn't make sense at all
----------------------------------------------------+-----------------------
Reporter: SimonKing | Owner: robertwb
Type: defect | Status:
needs_review
Priority: major | Milestone: sage-5.6
Component: coercion | Resolution:
Keywords: coercion conversion object cache | Work issues:
Report Upstream: N/A | Reviewers:
Authors: Simon King | Merged in:
Dependencies: | Stopgaps:
----------------------------------------------------+-----------------------
Comment (by SimonKing):
Too bad/good, I just tested it with sage-5.6.beta1:
{{{
sage: %timeit a = ZZ.ideal(5)
625 loops, best of 3: 147 µs per loop
sage: %timeit a = ZZ.ideal(5)
625 loops, best of 3: 144 µs per loop
sage: %timeit a = ZZ.ideal(5)
625 loops, best of 3: 147 µs per loop
sage: %timeit a = ZZ.ideal(5)
625 loops, best of 3: 148 µs per loop
sage: %timeit a = ZZ.ideal(5)
625 loops, best of 3: 146 µs per loop
sage: %timeit a = ZZ.ideal(5)
625 loops, best of 3: 147 µs per loop
sage: %timeit a = ZZ.ideal(5)
625 loops, best of 3: 148 µs per loop
sage: %timeit a = ZZ.has_coerce_map_from(5)
625 loops, best of 3: 82.1 µs per loop
sage: %timeit a = ZZ.has_coerce_map_from(5)
625 loops, best of 3: 81.4 µs per loop
sage: %timeit a = ZZ.has_coerce_map_from(5)
625 loops, best of 3: 81.3 µs per loop
}}}
So, the problem mentioned at #13400 does currently not exist.
We should investigate why it is not a problem.
--
Ticket URL: <http://trac.sagemath.org/sage_trac/ticket/13378#comment:14>
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 post to this group, send email to [email protected].
To unsubscribe from this group, send email to
[email protected].
For more options, visit this group at
http://groups.google.com/group/sage-trac?hl=en.
