On 2017-09-16 03:31, Nils Bruin wrote:
So if you're finding you can't put a "from A import a" at the top-level
and using it locally has noticeable cost (which can easily happen:
imports have a significant cost, even for modules that are already
present), then you could try to do a straight import and access the
appropriate namespace.
But accessing the namespace is also slower than doing the "from ...
import ..." import:
sage: x = 42
sage: timeit("sage.structure.element.parent(x)", number=20, repeat=10^6)
20 loops, best of 1000000: 143 ns per loop
sage: timeit("parent(x)", number=20, repeat=10^6)
20 loops, best of 1000000: 47.7 ns per loop
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