https://gcc.gnu.org/bugzilla/show_bug.cgi?id=107929
--- Comment #3 from cqwrteur <unlvsur at live dot com> --- (In reply to Matthias Kretz (Vir) from comment #2) > std::experimental::simd has always been implemented with GCC's vector > extension. Also copy_from and copy_to are implemented with __builtin_memcpy. The problem is that the compilation speed are very slow. immintrin.h header should not be included
