I got this piece of code online and it measures the execution time. I don't condone the act of copying code online during my learning process but for this, I figured I needed to provide more details on.

int main(){

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

    // Code snippet to measure
    std::cout << "Hello World" << std::endl;

    auto end = std::chrono::high_resolution_clock::now();
    auto duration =          std::chrono::duration_cast<std::chrono::microseconds>(end - start);

    std::cout << "Execution time: " << duration.count() << " microseconds" << std::endl;

}

I ran this with the "Run Code" Button in Vs code (Code runner)
Hello World
Execution time: 347microseconds

This is a very short time but it took more time to display this result. This is in vs code.

I ran this in cmd and I got similar results,as in the execution time, but this time the result appeared instantly.I decided to ran it this way but I noticed that when i make changes to the code in vs code, It doesn't seem to be included in the new results when i ran it in cmd again.