Only print AVX2 alignment error in debug mode

include/Directions.h

@@ -206,8 +206,10 @@ inline void Directions::radec2lmn<Directions::computation_strategy::MULTI_SIMD>(
   if (reinterpret_cast<std::uintptr_t>(ra.data()) %
           xsimd::arch_list<xsimd::avx2>::alignment() !=
       0) {
+#ifdef DEBUG
     std::cerr << "Warning: ra is not aligned. Using unaligned mode."
               << std::endl;
+#endif
     xsimd::dispatch<xsimd::arch_list<xsimd::avx2>>(xsimd::radec2lmn{})(
         reference, ra, dec, lmn_tmp, xsimd::unaligned_mode{});
   } else {