std.container.RedBlackTree versus C++ std::set

[bearophile]

Ivan Kazmenko:

> Thank you all for assistance, I've finally pinned it down!

This is great. The first step to solve a problem is to find it. 
The second step is to formalize it. So I suggest you to create a 
small benchmark that shows what you mean (it should not include 
RedBlackTree) and put it in Bugzilla, with some timings.

Bye,
bearophile