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

[rene.koecher@wincor-nixdorf.com]

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

--- Comment #28 from Rene Koecher <rene.koecher@wincor-nixdorf.com> ---
(In reply to Giuseppe Ottaviano from comment #26)

Giuseppe, is there an easy way you could provide me with your changes to
alloc_traits.h?

I'd really like to give it a shot against our codebase and see if there's any
speedup. I tried to follow along by taking the alloc_traits.h from 225242
adding the suggested diff to compensate for the missing bits in type_traits.

While this results in a working drop-in replacement I can not detect any
noticable changes in compile time.