#13663: Implement __len__ in LinearCode
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Reporter: ppurka | Owner: wdj
Type: enhancement | Status: needs_review
Priority: major | Milestone: sage-5.5
Component: coding theory | Resolution:
Keywords: | Work issues:
Report Upstream: N/A | Reviewers:
Authors: Punarbasu Purkayastha | Merged in:
Dependencies: | Stopgaps:
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Changes (by {'newvalue': u'Punarbasu Purkayastha', 'oldvalue': ''}):
* status: new => needs_review
* author: => Punarbasu Purkayastha
Old description:
> The default `len(C)` where `C` is some `LinearCode` instance is really
> slow.
> {{{
> sage: RS = ReedSolomonCode(15,3,GF(16,'a'))
> sage: timeit('len(RS)')
> 5 loops, best of 3: 1.06 s per loop
> }}}
> Attached patch fixes this by defining a `__len__` method.
> {{{
> sage: RS = ReedSolomonCode(15,3,GF(16,'a'))
> sage: timeit('len(RS)')
> 625 loops, best of 3: 3.09 µs per loop
> }}}
New description:
The default `len(C)` where `C` is some `LinearCode` instance is really
slow.
{{{
sage: RS = ReedSolomonCode(15,3,GF(16,'a'))
sage: timeit('len(RS)')
5 loops, best of 3: 1.06 s per loop
}}}
Attached patch fixes this by defining a `__len__` method.
{{{
sage: RS = ReedSolomonCode(15,3,GF(16,'a'))
sage: timeit('len(RS)')
625 loops, best of 3: 3.09 µs per loop
}}}
----
Apply [attachment:trac_13663-len_in_LinearCode.patch] to `devel/sage`
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Ticket URL: <http://trac.sagemath.org/sage_trac/ticket/13663#comment:1>
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