Dag Sverre Seljebotn <d.s.seljebotn@...> writes: > > cdef np.ndarray[double, mode='fortran'] arr > > that relies on PEP 3118 contiguous-flags and I did no checking myself. > Lots of Cython code does this instead of memoryviews (I still write my > own code that way). > > The memory views OTOH does their own checking, but I also see plenty of > references to PyBUF_C_CONTIGUOUS etc. inside > Cython/Utility/MemoryView.pyx, so perhaps it does both. Mark would have > the definitive answer here. > > Dag Sverre >
Is it the case that MemoryViews are doing some redundant checking? If so, is that the cause of the order of mangnitude performance difference between the MemoryView and ndarray syntax that I observed in the following thread? http://thread.gmane.org/gmane.comp.python.cython.devel/14626 Sorry for hijacking the thread, but it would be fantastic if the performance issues could be addressed at the same time if they are indeed linked Thanks, Dave _______________________________________________ cython-devel mailing list cython-devel@python.org http://mail.python.org/mailman/listinfo/cython-devel
