#15780: Increase Performance in Projective Morphism
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Reporter: drose | Owner: drose
Type: enhancement | Status: needs_work
Priority: minor | Milestone: sage-6.2
Component: algebraic | Resolution:
geometry | Merged in:
Keywords: Projective, | Reviewers: Ben Hutz
Morphism | Work issues:
Authors: Dillon Rose | Commit:
Report Upstream: N/A | 87572ab743acf23a63e213f1272192328fde7d49
Branch: u/drose/15780 | Stopgaps:
Dependencies: 16051 |
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Comment (by nbruin):
initialization of the fast_polys should probably be done lazily, unless
you can show it is always quick. There are many reasons to create
morphisms/rational maps that do not involve evaluating them at points. For
instance, you might want to take direct or inverse images of subvarieties.
For doing that one does not evaluate the defining polynomials, but one
does computations with the polynomials. It would be a shame to waste time
on computing fast_polys in those cases.
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Ticket URL: <http://trac.sagemath.org/ticket/15780#comment:13>
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