#11900: Serious regression caused by #9138
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Reporter: SimonKing | Owner: tbd
Type: defect | Status: needs_work
Priority: critical | Milestone: sage-4.8
Component: performance | Keywords: categories regression
Work_issues: | Upstream: N/A
Reviewer: Jeroen Demeyer | Author: Simon King
Merged: | Dependencies: #9138 #11911
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Comment(by SimonKing):
You write that the Category_singleton uses an optimized class call. It is
indeed slightly faster than the usual classcall, as it seems:
{{{
sage: from sage.categories.category_singleton import Category_singleton
sage: class MyRingsSingleton(Category_singleton):
....: super_categories = Rings.__dict__['super_categories']
....:
sage: MR = MyRingsSingleton()
sage: MR
Category of my rings singleton
sage: %timeit MyRingsSingleton()
625 loops, best of 3: 5.28 µs per loop
sage: %timeit Rings()
625 loops, best of 3: 6.92 µs per loop
sage: %timeit MyRingsSingleton()
625 loops, best of 3: 3.39 µs per loop
sage: %timeit Rings()
625 loops, best of 3: 6.92 µs per loop
sage: %timeit MyRingsSingleton()
625 loops, best of 3: 3.38 µs per loop
sage: %timeit Rings()
625 loops, best of 3: 7.02 µs per loop
}}}
I don't know why the first "timeit" for `MyRingsSingleton` is so match
slower than the other two runs.
--
Ticket URL: <http://trac.sagemath.org/sage_trac/ticket/11900#comment:102>
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