#18346: Easier handling of vertex labels in graph backends
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Reporter: | Owner:
ncohen | Status: needs_review
Type: | Milestone: sage-6.7
enhancement | Resolution:
Priority: major | Merged in:
Component: graph | Reviewers:
theory | Work issues:
Keywords: | Commit:
Authors: | d921cd9b951e14dcf7085788a254b213d3c40dfd
Nathann Cohen | Stopgaps:
Report Upstream: N/A |
Branch: |
public/18346 |
Dependencies: |
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Comment (by vdelecroix):
Replying to [comment:14 ncohen]:
> If this kind of cast from !Python/!Sage integer is really costly,
perhaps we should have a cdef function that does it somewhere?
That's a possibility, but it is not clear what should be the signature of
the function. What if it fails?
> Do I make a mistake if I say that you wrote this code in order to avoid
having to raise an exception in many cases?
It is not only that: calling directyl `mpz_get_si` or `PyInt_AS_LONG` is
faster than the cast which does call `PyInt_AsLong`. But that's true that
I do not like this `try/except`.
--
Ticket URL: <http://trac.sagemath.org/ticket/18346#comment:15>
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