#18987: Parallel computation of number of solutions in dancing links
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Reporter: | Owner:
slabbe | Status: needs_review
Type: | Milestone: sage-6.9
enhancement | Resolution:
Priority: major | Merged in:
Component: | Reviewers: Vincent Delecroix
combinatorics | Work issues:
Keywords: | Commit:
Authors: | 29ff98625316f95c48fd704115a209dce38deda8
Sébastien Labbé | Stopgaps:
Report Upstream: N/A |
Branch: |
public/18987 |
Dependencies: |
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Changes (by slabbe):
* status: needs_work => needs_review
Comment:
Thanks for your review! I fixed the first comments.
> - I do not see the point of having `number_of_solutions_iterator` and
`number_of_solutions`. You should just get rid of the first one and allow
parallelization in the second.
- `number_of_solutions_iterator` is now `_number_of_solutions_iterator`
- `number_of_solutions` now allows parallel computation
- I kept `_number_of_solutions_iterator` because for the problem I am
currently looking at, `number_of_solutions` takes days while
`_number_of_solutions_iterator` yield something once every hours. So it
allows me to follow the computation, making sure it is not stuck and
evaluate the duration left to do. I prefer this way rather than removing
method `_number_of_solutions_iterator` and adding some verbose thing in
`number_of_solutions`.
> - Why not also make available parallelization for getting the list of
solutions?
Because I don't know how or if it is possible to use the parallel
decorator to merge iterators.
--
Ticket URL: <http://trac.sagemath.org/ticket/18987#comment:67>
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