[Raypp-general] C++ performance optimizations

[Andreas K. <and...@we...>]

Hi!

 

I just came across an interesting technique for speeding up vector and 

matrix operations: expression templates

This really cool technique uses C++ templates to parse expressions at
compile time and (ideally) creates optimized code that can be close to
what you can reach by writing hand optimized code for the given specific 
expression.
See http://tvmet.sourceforge.net/introduction.html for details and a ready
to use library for vector/matrix operations.

 

Also we should think about the performance penalties ray++ might have 

because it uses polymorphism/virtual functions. I haven't really had a 

close look but I could image that there's some potential for performance 

optimization.




There's a good paper that describes techniques for speeding up scientific
C++ code: http://osl.iu.edu/~tveldhui/papers/techniques/



Andreas