Hallo, can you improve numeric_cast 1) constexpr 2) vectorisable The problem is that the compilers on x86 without hardware support (AVX512DQ) do not vectorize the conversions u/int64_t -> float64/32_t. This may also apply to other architectures. But that can be solved manually. My patch requires C++20 (std::bit_cast), but you can probably work around that. Modifications: - add #include - improve raw_converter For a better understanding see https://godbolt.org/z/j58rW411s regards Gero