#4366: sys.path is searched ("stat"ed) for *.pyx-files insanely often
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Reporter: GeorgSWeber | Owner: GeorgSWeber
Type: defect | Status: assigned
Priority: major | Milestone: sage-3.2.1
Component: coercion | Resolution:
Keywords: |
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Changes (by GeorgSWeber):
* status: new => assigned
Comment:
I know now how to change the code so that when we had before:
{{{
sage: time for i in range(10^4): float(1)/2
CPU times: user 17.72 s, sys: 13.44 s, total: 31.16 s
Wall time: 31.20 s
}}}
then after the changes we get:
{{{
sage: time for i in range(10^4): float(1)/2
CPU times: user 0.37 s, sys: 0.00 s, total: 0.37 s
Wall time: 0.37 s
}}}
which is quite impressive, I think (the sys time is used up only by these
insanely many calls to "stat")!
Essentially all one has to do is not to call "sys.exc_info()" in
"_record_exception" (file: sage/structure/coerce.pyx) unless you really
want to do so. But to fix that nicely (e.g. not leaving a broken doctest)
will take me another evening or two.
--
Ticket URL: <http://trac.sagemath.org/sage_trac/ticket/4366#comment:2>
Sage <http://sagemath.org/>
Sage - Open Source Mathematical Software: Building the Car Instead of
Reinventing the Wheel
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