[Bug libstdc++/54393] std::getline is almost 10x slower when working on a vstring versus std::string

[paolo.carlini at oracle dot com]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=54393

--- Comment #6 from Paolo Carlini <paolo.carlini at oracle dot com> 2012-08-29 
13:53:23 UTC ---
No, I'm sorry, we are not going to do that for vstring. Remember that vstring
is just a preview of the new std::string implementation for when we break the
ABI. We are not going to add symbols and make things more complex for it. The
core issue is trivial, of course, when vstring will be "promoted" to main
string implementation will get the optimizations and everything else.