#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 | 6be7361b9186ede2ff230139c7972c9f38fc8f94
Branch: | Stopgaps:
u/bhutz/ticket/15780 |
Dependencies: #16051 |
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Comment (by nbruin):
Replying to [comment:23 bhutz]:
> We could put a try/except in call and init them in the except. Any idea
how much overhead a try block adds? As far as I can tell in a couple tests
it doesn't actually add an execution time. If that's the case, then there
is no reason not to do it lazily.
Python is designed to let "try" be very fast. If an exception occurs there
is a bit larger penalty but in this case it wouldn't be measurable
compared to the `fast callable`.
The recommended way to store the fast_callable would be by accessing them
through a `cached_method` or a `lazy_attribute`. See their docstrings for
examples. Just don't go sticking `cached_method` decorators on methods
arbitrarily. That's how we get memory leaks :-).
--
Ticket URL: <http://trac.sagemath.org/ticket/15780#comment:24>
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