#13922: Avoid a regression in the creation of homsets
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Reporter: SimonKing | Owner: tbd
Type: defect | Status: needs_review
Priority: critical | Milestone: sage-5.6
Component: performance | Resolution:
Keywords: | Work issues:
Report Upstream: N/A | Reviewers:
Authors: Simon King | Merged in:
Dependencies: #715 | Stopgaps:
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Changes (by {'newvalue': u'Simon King', 'oldvalue': ''}):
* status: new => needs_review
* author: => Simon King
Comment:
The attached patch is preliminary, as it is not tested, and I don't know
if I was over-eager to cdefine stuff.
Anyway. Without the patch, it is
{{{
sage: %timeit a = QQ.gcd(3.14159,2*3.14159)
125 loops, best of 3: 4.58 ms per loop
sage: var('t')
t
sage: %time p = plot(lambda t:
(100/(100+(t-pi/2)^8))*(2-sin(7*t)-cos(30*t)/2), -pi/4, 3*pi/2,
color="red",plot_points=1000)
CPU times: user 87.06 s, sys: 0.69 s, total: 87.75 s
Wall time: 88.15 s
}}}
With the patch, it is
{{{
sage: %timeit a = QQ.gcd(3.14159,2*3.14159)
125 loops, best of 3: 2.33 ms per loop
sage: var('t')
t
sage: %time p = plot(lambda t:
(100/(100+(t-pi/2)^8))*(2-sin(7*t)-cos(30*t)/2), -pi/4, 3*pi/2,
color="red",plot_points=1000)
CPU times: user 55.41 s, sys: 0.00 s, total: 55.41 s
Wall time: 55.48 s
}}}
Would that be enough to fix the regression completely?
--
Ticket URL: <http://trac.sagemath.org/sage_trac/ticket/13922#comment:16>
Sage <http://www.sagemath.org>
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