#13589: Controlling C3 to solve once for all the Method Resolution Order issues
for
category classes
----------------------------------------------------------+-----------------
Reporter: nthiery | Owner:
nthiery
Type: defect | Status:
needs_review
Priority: major | Milestone:
sage-5.11
Component: categories | Resolution:
Keywords: method resolution order, C3 | Work issues:
Report Upstream: N/A | Reviewers:
Simon King, Florent Hivert
Authors: Nicolas M. Thiéry | Merged in:
Dependencies: #12894, #12876, #11935, #12895, #10193 | Stopgaps:
----------------------------------------------------------+-----------------
Comment (by SimonKing):
Here is another possibility to speed things up: Replace itertools.count()
by a cpdef method, defined in some auxiliary file.
Timing:
{{{
sage: cython("""
cdef long counter = 0
cpdef count1():
global counter
counter += 1
return counter
def count2():
cdef long c = 0
while True:
c += 1
yield c
""")
sage: C = count1
sage: %timeit a = C()
10000000 loops, best of 3: 73.8 ns per loop
sage: C = count2()
sage: %timeit a = C.next()
1000000 loops, best of 3: 252 ns per loop
sage: import itertools
sage: C = itertools.count()
sage: %timeit a = C.next()
1000000 loops, best of 3: 231 ns per loop
}}}
Note that this would also make the startup_module plugin happy, since it
complains about the new import of itertools during startup.
--
Ticket URL: <http://trac.sagemath.org/sage_trac/ticket/13589#comment:53>
Sage <http://www.sagemath.org>
Sage: Creating a Viable Open Source Alternative to Magma, Maple, Mathematica,
and MATLAB
--
You received this message because you are subscribed to the Google Groups
"sage-trac" group.
To unsubscribe from this group and stop receiving emails from it, send an email
to [email protected].
To post to this group, send email to [email protected].
Visit this group at http://groups.google.com/group/sage-trac.
For more options, visit https://groups.google.com/groups/opt_out.
