Method begin

less_slow.cpp:3311–3311

    ~unified_array() noexcept { cudaFree(data_); }

    type_ *begin() const noexcept { return data_; }
    type_ *end() const noexcept { return data_ + size_; }
    type_ &operator[](std::size_t index) noexcept { return data_[index]; }
    type_ operator[](std::size_t index) const noexcept { return data_[index]; }