Learn++ Lesson 57: Measuring Execution Time in C++ Programming

Measuring execution time helps developers benchmark code and identify performance bottlenecks. This lesson uses the std::chrono library and high_resolution_clock to capture start and stop times, then converts the elapsed duration to microseconds with duration_cast.

A small example looks like this

#include <iostream>
#include <chrono>
int main() {
    auto start = std::chrono::high_resolution_clock::now();
    // Some code here
    auto stop = std::chrono::high_resolution_clock::now();
    auto duration = std::chrono::duration_cast<std::chrono::microseconds>(stop - start);
    std::cout << "Time taken: " << duration.count() << " microseconds";
    return 0;
}

What you practice in the app

  • Capturing start and stop timestamps with std::chrono::high_resolution_clock::now().
  • Converting an elapsed duration to microseconds with std::chrono::duration_cast.
  • Printing a measured duration for basic benchmarking.

Today's challenge

Replace the placeholder with `microseconds` to convert the duration to microseconds.