#17327: Simplify computation of values of Dirichlet characters
-------------------------------------+-------------------------------------
Reporter: pbruin | Owner:
Type: task | Status: needs_work
Priority: minor | Milestone: sage-6.4
Component: number theory | Resolution:
Keywords: Dirichlet | Merged in:
characters | Reviewers:
Authors: Peter Bruin | Work issues:
Report Upstream: N/A | Commit:
Branch: | 511c9a507c751129d3003d1c15c9ecca0029b587
u/pbruin/17327-DirichletCharacter_values| Stopgaps:
Dependencies: #17317, #17319 |
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Changes (by pbruin):
* status: needs_review => needs_work
Comment:
Unfortunately the current version gives a 50% slowdown (from 3 seconds to
4.5 seconds) for the following command:
{{{
sage: %timeit -n 1 -r 1 -c [[chi.values() for chi in DirichletGroup(n)]
....: for n in xrange(1, 100)]
}}}
This seems to be caused by an overdose of Python `map` and `lambda`
constructions.
--
Ticket URL: <http://trac.sagemath.org/ticket/17327#comment:2>
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