#20831: Make infinity rings a subclass of singleton
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Reporter: tscrim | Owner: tscrim
Type: enhancement | Status: new
Priority: major | Milestone: sage-7.3
Component: symbolics | Keywords:
Merged in: | Authors: Travis Scrimshaw
Reviewers: | Report Upstream: N/A
Work issues: | Branch:
Commit: | Dependencies:
Stopgaps: |
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Subclasses of `Singleton` are over 3x faster when recreating the ring:
{{{
sage: from sage.misc.fast_methods import Singleton
sage: from sage.rings.infinity import _uniq
sage: class Foo(_uniq, object):
....: def __init__(self):
....: pass
sage: class Bar(Singleton, object):
....: def __init__(self):
....: pass
sage: %timeit Foo()
The slowest run took 71.72 times longer than the fastest. This could mean
that an intermediate result is being cached.
1000000 loops, best of 3: 306 ns per loop
sage: %timeit Bar()
The slowest run took 400.59 times longer than the fastest. This could mean
that an intermediate result is being cached.
10000000 loops, best of 3: 94.6 ns per loop
}}}
Also IMO, it is a more Sage standard class than the `_uniq`, and so, more
maintainable.
--
Ticket URL: <http://trac.sagemath.org/ticket/20831>
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