#17814: Make calling a cached method independent of source code inspection
-------------------------------------+-------------------------------------
Reporter: SimonKing | Owner:
Type: defect | Status: needs_review
Priority: major | Milestone: sage-6.6
Component: distribution | Resolution:
Keywords: | Merged in:
Authors: Simon King | Reviewers:
Report Upstream: N/A | Work issues:
Branch: | Commit:
u/SimonKing/make_calling_a_cached_method_independent_of_source_code_inspection|
a0b829dc10b4ccb00b99e073de8a1c0006aa1e51
Dependencies: | Stopgaps:
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Comment (by nbruin):
If we need to access argument information on cython functions/methods, we
might consider using
{{{
cython("""
import cython
@cython.binding(True)
def f(a,b=0): pass
def g(a,b=0): pass
def c(F,n_in):
cdef int n=n_in
for i in range(n):
F(1)
""")
}}}
With this we have
{{{
sage: f.func_defaults
(0,)
sage: f.__code__.co_varnames
('a', 'b')
}}}
There might be a penalty to pay, though:
{{{
sage: %time c(f,1000000000)
CPU times: user 7.7 s, sys: 10 ms, total: 7.71 s
Wall time: 8.06 s
sage: %time c(g,1000000000)
CPU times: user 7.43 s, sys: 13 ms, total: 7.45 s
Wall time: 7.78 s
}}}
If we can do away with source file inspection during startup (as would now
happen for cython modules), we should see a significant improvement of
startup time too! Finding line numbers in a text file is not a fast
operation.
--
Ticket URL: <http://trac.sagemath.org/ticket/17814#comment:41>
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