https://gcc.gnu.org/bugzilla/show_bug.cgi?id=58770
Manuel López-Ibáñez <manu at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2014-06-27
CC| |manu at gcc dot gnu.org
Ever confirmed|0 |1
--- Comment #2 from Manuel López-Ibáñez <manu at gcc dot gnu.org> ---
The GCC preprocessor is very optimized for include guards. Perhaps the same
optimizations are not applied for "#pragma once". Someone will need to
investigate where the two code paths differ and what could be the reason for
the slow-down.
Unfortunately, there are very few developers working on the preprocessor and
very few users of "#pragma once", so this will likely have very low priority
unless one of those users takes the lead to fix it.
