https://gcc.gnu.org/bugzilla/show_bug.cgi?id=69564
--- Comment #19 from vincenzo Innocente <vincenzo.innocente at cern dot ch> --- patch applied to gcc version 6.0.0 20160324 (experimental) [trunk revision 234461] (GCC) I confirm the improvement in timing for c++ and lto timing difference between gcc and c++ seems to be inside "errors" I am satisfied. Thanks Patrick! (btw I suppose no hope for a back port to 5.4?)