Example of std::chrono timepoints.

chrono-timepoints.cpp

#include <chrono>
#include <iostream>

int main() {
  auto start = std::chrono::high_resolution_clock::now();

  long long some_number = 1799997;
  for (unsigned i = 0; i<100000000; i++) {
      some_number *= some_number;
  }

  auto end = std::chrono::high_resolution_clock::now();

  std::cout << "Operation took: " << std::chrono::duration_cast<std::chrono::milliseconds>(end - start).count() << "ms" << std::endl;
}