Robert Bradshaw wrote: > %cython > > cdef foo_c(): > pass > > def do_loop_c_call(int n, int m): > cdef int i, j > for i in range(n): > for j in range(m): > foo_c() > [...] > sage: time do_loop_c_call(5000, 500) > CPU time: 0.00 s, Wall time: 0.00 s > > The moral of the story is that the loop overhead can be reduced to > essentially a clock cycle or two per iteration (nanoseconds)
Have you looked at the assembly that the above code compiles into? I wouldn't be surprised if the C compiler inlined the call to foo_c(), and then removed the entire loop as useless code. Stefan _______________________________________________ Cython-dev mailing list [email protected] http://codespeak.net/mailman/listinfo/cython-dev
