Timing

...

the first way to time the execution is by using the built in timer Chrono in C++:

#include <iostream>
#include <chrono>
#include <thread>
int main(){

	using namespace std::literals::chrono_literals;
	auto start = std::chrono::high_resolution_clock::now();
	std::this_thread()::sleep_for(1s);
	auto end = std::chrono::high_resolution_clock::now();

	std::chrono::duration<float> duration = end - start;
	std::cout << duration .count() << "s " << std::endl;
	
	std::cin.get()
}
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now a better way to use this with less code :

#include <iostream>
#include <chrono>
#include <thread>
struct Timer {
    std::chrono::time_point<std::chrono::high_resolution_clock> start, end;
    std::chrono::duration<float> duration;
    
    Timer() {
        start = std::chrono::high_resolution_clock::now();
    }
    
    ~Timer() {
        end = std::chrono::high_resolution_clock::now();
        duration = end - start;
        float ms = duration.count() * 1000.0f;
        std::cout << "Timer took " << ms << "ms " << std::endl;  
    }
};

void function(){
	Timer timer;
	for (int i=0; i<100; i++){
		std::cout << i << std::endl;
	}
}

void fasterFunction(){
	Timer timer;
	for (int i=0; i<100; i++){
		std::cout << i << "\n";
	}
}

int main(){
	//fasterfunction
	function();
	std::cin.get();
}
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you can also use the operating system timer e.g. in windows you can use something like winsock.