Function d

src/bench/nanobench.h:1311–1313

// helpers to get double values
template <typename T>
inline double d(T t) noexcept {
    return static_cast<double>(t);
}
inline double d(Clock::duration duration) noexcept {
    return std::chrono::duration_cast<std::chrono::duration<double>>(duration).count();
}