[heavenlyblue]

I don't know: if you really need to do some heavyweight maths in C++, you're going to go the CUDA/heavyweight intrinsic way anyway. I don't yet see how STL containers (excuse me for the pun) contain the performance problem at it's limit - but otherwise why would you use C++?

Also, having these specific structures as part of the standard library would make you think that what you're doing is acceptable: thinking about the overhead of a doubly-linked-list when your variable assignment operation requires an access to a Namespace object based on a variation of a HashMap.

Seriously: whenever you need a fast solution, Python doesn't stop you from building something in C++. But trying to make Python into C++ is either an incredibly long shot or just having no idea what Python is actually useful for.