[libstdc++ PATCH/RFC] Aggressive space optimization for std::vector

[Gabriel Dos Reis]

Doug Gregor <dgregor@apple.com> writes:

|                     I don't know, but I do know we can do a pretty
| good job at the library level, and we can have it now on all platforms.

I'm not convinced this is an absolute win.  Thta is a tradeoff.
You're optimizing for space at the library level.  It is important to
know the effect on speed.  Optimizing for space tends to have a
negative effect on speed. 

-- Gaby