#15038: Improve startuptime by postponing the creation of argspecs of cached
functions/methods
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Reporter: | Owner:
SimonKing | Status: new
Type: | Milestone: sage-5.12
enhancement | Keywords: cached method, argspec,
Priority: major | introspection, startup
Component: | Authors: Simon King
performance | Report Upstream: N/A
Merged in: | Branch:
Reviewers: | Stopgaps:
Work issues: |
Dependencies: |
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Currently, if a cached method or function is created, an instance of
`sage.misc.function_mangling.ArgumentFixer` is created as well. But this
is only needed when the cached function/method is actually called.
With this patch, the `ArgumentFixer` is either created when it is needed
to normalise arguments (i.e., when the function is called), or when a
`CachedMethodCaller` is bound to an instance. The latter is because
different `CachedMethodCaller`s bound to different instances share the
`ArgumentFixer` with the `CachedMethod` that is bound to the class of the
instances. Hence, it is reasonable to avoid creating the same
`ArgumentFixer` repeatedly.
Without the patch, more than 500 `ArgumentFixer`s are created during
startup of Sage. This is expensive, because one needs to determine the
argspec of the cached functions/methods (this may even involve reading
source code!!). With the patch, only 6 `ArgumentFixer`s are created.
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Ticket URL: <http://trac.sagemath.org/ticket/15038>
Sage <http://www.sagemath.org>
Sage: Creating a Viable Open Source Alternative to Magma, Maple, Mathematica,
and MATLAB
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