Hands-On System Programming with C++

Studying an example on high-resolution timer

In this example, we will create a simple benchmark using high_resolution_clock{}. To accomplish this, the following inclusions and namespaces are needed:

#include <chrono>#include <iostream>#include <gsl/gsl>

To create a benchmark function, we use the following:

template<typename FUNC>auto benchmark(FUNC func) {    auto stime = std::chrono::high_resolution_clock::now();    func();    auto etime = std::chrono::high_resolution_clock::now();    return etime - stime;}

This function has been seen before in Chapter 8, Learning to Program File Input/Output, The Logger Example. This code leverages functional programming to wrap a function call (likely a lambda) between two calls to the high-resolution clock. The results ...