A simple guide to choosing an appropriate data structure from the stdlib

[bstrie]

I ran across this guide to selecting a container from the types offered in C++'s STL:

Something similar might be useful for navigating Rust's std and extra containers (though it doesn't necessarily need to be an image).

[thestinger]

This is essentially what I intend to do with the current stub container tutorial, by adding a table showing the asymptotic performance of various operations and mentioning the other useful properties of various containers.

[pnkfelix]

part of #11755

[steveklabnik]

I'm pulling a massive triage effort to get us ready for 1.0. As part of this, I'm moving stuff that's wishlist-like to the RFCs repo, as that's where major new things should get discussed/prioritized.

This issue has been moved to the RFCs repo: rust-lang/rfcs#780