On Thu, May 22, 2008 at 12:26 PM, Stéfan van der Walt <[EMAIL PROTECTED]> wrote: > Just to clarify things in my mind: is VTK *that* slow? I find that > surprising, since it is written in C or C++.
Performance can depend more on the design of the code than the implementation language. There are several places in VTK which are slower than they strictly could be because VTK exposes data primarily through abstract interfaces and only sometimes expose underlying data structure for faster processing. Quite sensibly, they implement the general form first. It's much the same with parts of numpy. The iterator abstraction lets you work on arbitrarily strided arrays, but for contiguous arrays, just using the pointer lets you, and the compiler, optimize your code more. -- Robert Kern "I have come to believe that the whole world is an enigma, a harmless enigma that is made terrible by our own mad attempt to interpret it as though it had an underlying truth." -- Umberto Eco _______________________________________________ Numpy-discussion mailing list Numpy-discussion@scipy.org http://projects.scipy.org/mailman/listinfo/numpy-discussion
