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// Main.cpp
#include <iostream>
#include "Timer.h"

int main() {
	Timer::begin("Test");

	Timer::stop();

	std::cin.get();
}







// Timer.h
#pragma once
#include <string>
#include <chrono>

class Timer {
private:
	static std::string label;
	static std::chrono::steady_clock::time_point start;
	static std::chrono::steady_clock::time_point end;

public:
	static void begin(std::string);

	static void stop();
};








// Timer.cpp
#include <iostream>
#include <string>
#include <chrono>
#include "Timer.h"

void Timer::begin(std::string timer_name) {
	label = timer_name;
	start = std::chrono::high_resolution_clock::now();
}

void Timer::stop() {
	auto end = std::chrono::high_resolution_clock::now();
	auto duration = end - start;

	std::cout << label << ':' << " took " << duration.count() << "ns" << std::endl;
}