#11342: Make getattr faster on parents and elements
------------------------------+---------------------------------------------
Reporter: SimonKing | Owner:
Type: enhancement | Status: needs_review
Priority: major | Milestone: sage-4.7.2
Component: performance | Keywords: getattr parent element
Work_issues: | Upstream: N/A
Reviewer: Jeroen Demeyer | Author: Simon King
Merged: | Dependencies: #9944
------------------------------+---------------------------------------------
Old description:
> If an attribute of a parent or element can not be found by inspecting the
> method resolution order, `__getattr__` is invoked. It tries to obtain the
> attribute from the parent class or the element class of the category of
> the parent. If it can not be found, the attribute error is raised using a
> Cython function `sage.structure.parent.raise_attribute_error`.
>
> I see several ways to make both `__getattr__` and
> `sage.structure.parent.raise_attribute_error` a lot faster. Details will
> be given in the comments.
>
> Because of one doctest in `sage.categories.primer`, it is needed that the
> category of polynomial rings is properly initialised. Therefore:
>
> Depends on #9944
>
> Apply [attachment:trac11342-attribute_error_message.rebased.patch],
> [attachment:trac_11342_fix_pari_initialization.patch]
New description:
If an attribute of a parent or element can not be found by inspecting the
method resolution order, `__getattr__` is invoked. It tries to obtain the
attribute from the parent class or the element class of the category of
the parent. If it can not be found, the attribute error is raised using a
Cython function `sage.structure.parent.raise_attribute_error`.
I see several ways to make both `__getattr__` and
`sage.structure.parent.raise_attribute_error` a lot faster. Details will
be given in the comments.
Because of one doctest in `sage.categories.primer`, it is needed that the
category of polynomial rings is properly initialised. Therefore:
Depends on #9944
Apply
* [attachment:trac11342-attribute_error_message.rebased.patch]
* [attachment:trac_11342_fix_pari_initialization.patch]
* [attachment:trac_11342_fix_pari_ring.patch]
--
Comment(by SimonKing):
I have already produced a patch on the pari ring problem. Volker, does it
make your segfault vanish? At least, I think that my patch improves the
code quality of pari_ring.py.
--
Ticket URL: <http://trac.sagemath.org/sage_trac/ticket/11342#comment:48>
Sage <http://www.sagemath.org>
Sage: Creating a Viable Open Source Alternative to Magma, Maple, Mathematica,
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