}

void operation2(size_t n) { std::unordered_map m; m.reserve(n);for (size_t i{}; i < n; ++i ) { m.insert({i, std::to_string(i)}); }

}

template inline constexpr std::string_view get_unit(T) { using U = std::decay_t; if constexpr (std::is_same_v) return "ns"; else if constexpr (std::is_same_v) return "us"; else if constexpr (std::is_same_v) return "ms"; else if constexpr (std::is_same_v) return "s"; else return "unknown"; } template constexpr bool is_duration_v = false; template constexpr bool is_duration_v> = true;

template, int> = 0 > auto benchmark(F&& f, Args&&… args) -> std::result_of_t { auto t1 = std::chrono::high_resolution_clock::now(); std::forward(f)(std::forward(args)…); auto t2 = std::chrono::high_resolution_clock::now(); auto elapsed = std::chrono::duration_cast(t2 - t1); std::cout << "Benchmark.\nElapsed: " << elapsed.count() << " " << get_unit(elapsed) << "\n";if constexpr (std::is_same_v<std::result_of_t<F(Args...)>, void>) { return; } return f(std::forward<Args>(args)...);

}

int main(void) { using nano = std::chrono::nanoseconds;benchmark<nano>(operation, 10000000); benchmark<nano>(operation2, 10000000); return 0;

SI la conversion es valida (ok), entonces guarda esa conversion en ipnet.