- clib_memcpy(underlay0, t0->rewrite_header.data + rw_hdr_offset, underlay_hdr_len);
- clib_memcpy(underlay1, t1->rewrite_header.data + rw_hdr_offset, underlay_hdr_len);
+ clib_memcpy_fast(underlay0, t0->rewrite_header.data + rw_hdr_offset, underlay_hdr_len);
+ clib_memcpy_fast(underlay1, t1->rewrite_header.data + rw_hdr_offset, underlay_hdr_len);