https://gcc.gnu.org/bugzilla/show_bug.cgi?id=69656
--- Comment #14 from Markus Trippelsdorf <trippels at gcc dot gnu.org> --- > A good start would be to try individual ubsan sanitizers to spot the "worst" > one > (I guess overflow or maybe null/alignment). Most individual ubsan sanitizers are in the noise. Here's a list of the significant ones: (baseline is 36 seconds without any sanitizer) -fsanitize=vptr 2:03.22 minutes -fsanitize=alignment 1:21.92 minutes -fsanitize=null 1:19.47 minutes -fsanitize=object-size 41.69 seconds