https://gcc.gnu.org/bugzilla/show_bug.cgi?id=63927
--- Comment #1 from Markus Trippelsdorf <trippels at gcc dot gnu.org> --- The numbers above are seconds. Perf shows: 29.44% a.out libgcc_s.so.1 [.] uw_update_context_1 13.08% a.out libasan.so.2.0.0 [.] __sanitizer::mem_is_zero(char const*, unsigned long) 11.40% a.out libgcc_s.so.1 [.] execute_cfa_program 5.61% a.out libpthread-2.18.so [.] pthread_mutex_unlock 5.26% a.out libc-2.18.so [.] memcpy 4.90% a.out libgcc_s.so.1 [.] _Unwind_IteratePhdrCallback 4.07% a.out libasan.so.2.0.0 [.] __asan_region_is_poisoned 3.33% a.out libpthread-2.18.so [.] pthread_mutex_lock 2.51% a.out libgcc_s.so.1 [.] uw_frame_state_for 2.36% a.out libc-2.18.so [.] memset 1.53% a.out libasan.so.2.0.0 [.] __interceptor_strlen 1.51% a.out libgcc_s.so.1 [.] read_encoded_value_with_base 1.38% a.out libasan.so.2.0.0 [.] __asan_memcpy 0.95% a.out libasan.so.2.0.0 [.] __asan_memset
