https://gcc.gnu.org/bugzilla/show_bug.cgi?id=115855
--- Comment #2 from Andrew Pinski <pinskia at gcc dot gnu.org> --- > This is with a checking compiler though so testing with =release One thing you can test without recompile of gcc is -fno-checking . Second thing is: garbage collection : 3.38 ( 5%) 0.13 ( 1%) 3.54 ( 4%) 0 ( 0%) Which shows up more with checking=yes due to lower gc parameters.