[Bug c++/60976] Compilation with G++ 4.9.0 is 2-3 times slower than with 4.8.2

[redi at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=60976

--- Comment #27 from Jonathan Wakely <redi at gcc dot gnu.org> ---
(In reply to Giuseppe Ottaviano from comment #26)
> Do you use partial specializations as performance optimizations (thus
> equivalent to the general case) in libstdc++?

No, but doing so for std::allocator_traits<std::allocator<T>> might make sense.